which engine oil would you recommend?
22 January 2008, 10:21 AM
#61
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No way of knowing, the 40 refers to viscosity at 100C, if both have the same API rating (eg SJ) then that refers to them meeting a minimum standard at 135C where they will both have the same standard to meet, but beyond that there is no way of knowing!
Simon
Simon
22 January 2008, 10:37 AM
#62
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I don't think it would be unreasonable to assume that as viscosity decreases fairly linearly with temperature that the one with the greatest stability ie the least change up to 100C, would also exibit this trend as it continues above this temperature.
22 January 2008, 12:49 PM
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Just use cooking oil! 
I'm going with shell helix 10w40 semi syn this oil change.
If its good enough for 911's race car, it's good enough for mine!
I'm going with shell helix 10w40 semi syn this oil change.
If its good enough for 911's race car, it's good enough for mine!
22 January 2008, 01:11 PM
#67
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stop the nonsense LOL its 10W 40 semi synthetic good quality
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
22 January 2008, 01:15 PM
#68
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stop the nonsense LOL its 10W 40 semi synthetic good quality
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
Well that's all very well, but how do we whether to go along with this or one of the preceding 66 posts ?
22 January 2008, 01:20 PM
#69
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I don't get why people go for a semi, when the one thing experts seem to agree on is that a proper Ester based fully synth is superior and it doesn't even cost that much more. Surely, where lubricants are concerned, you should get the best quality available?
Ns04
Ns04
22 January 2008, 02:21 PM
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stop the nonsense LOL its 10W 40 semi synthetic good quality
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
SUBARU RECOMMEND THIS for a normal road car,
if you drive hard and fast then put in 15W 50 mobil motorsport
or if your car is sort of brand new then 5W 40 fully synthetic
CLASSICS- 10W 40 Semi Synthetic everytime, MOBIL SUPER S HIGH PERFORMANCE my cars LOVE it!!!!!!
just use a genuine subaru oil filter and get a new sump washer, OH PREFILL the oil filter first too
Simon
22 January 2008, 04:45 PM
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Two aircraft engineers are working late one night at Heathrow and decide to end their shift with a drink. Unfortunately, there isn't a drop of booze in the place, so they decide to give jet fuel a go. They get quite happily sloshed on the stuff and the next morning, they speak on the phone
"That fuel was great; I don't even have a hangover!" one said.
"Me too, but just one thing". said the other, "Apparently you didn't fart, during your sleep, cause I've just woken up in Glasgow!!
22 January 2008, 04:50 PM
#76
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1) I don't get why people go for a semi,
2) when the one thing experts seem to agree on is that a proper Ester based fully synth is superior and it doesn't even cost that much more. Surely, where lubricants are concerned, you should get the best quality available?
Ns04
2) Although PSL would be turning in his grave/ban, I agree, Ester based it has to be for a modded car.
22 January 2008, 05:58 PM
#77
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Just to redress the balance after my previous very non technical input, if you were concerned that oil additives may have a detrimental effect on flow, it's ok.
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
22 January 2008, 06:04 PM
#79
Just to redress the balance after my previous very non technical input, if you were concerned that oil additives may have a detrimental effect on flow, it's ok.
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
what he said
22 January 2008, 07:03 PM
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Just to redress the balance after my previous very non technical input, if you were concerned that oil additives may have a detrimental effect on flow, it's ok.
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
22 January 2008, 09:34 PM
#81
wow guys!!
i dont mind telling you i'm confused as f**k!!
my 98 wagon turbo is due for an oil change so i foned my dealer to ask what they recommend they said for mine with the( ppp,group n decat downpipe,decat centre pipe,green filter,)they recommend and have used 5w40 fully synthetic!!and have done for years and also is in mine already!! then i foned a local subaru specialist who said 10w50!!
so my question is what the hell do i use???????
please someone give me a clue!!
thanks alot
nick.
i dont mind telling you i'm confused as f**k!!
my 98 wagon turbo is due for an oil change so i foned my dealer to ask what they recommend they said for mine with the( ppp,group n decat downpipe,decat centre pipe,green filter,)they recommend and have used 5w40 fully synthetic!!and have done for years and also is in mine already!! then i foned a local subaru specialist who said 10w50!!
so my question is what the hell do i use???????
please someone give me a clue!!
thanks alot
nick.
22 January 2008, 10:00 PM
#82
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Just to redress the balance after my previous very non technical input, if you were concerned that oil additives may have a detrimental effect on flow, it's ok.
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
The flow of single and multi-grade lubricants between eccentric cylinders was studied experimentally to assess the effect of polymer additives. Azimuthal velocity profiles were measured in steady flow using laser Doppler velocimetry. The addition of polymer significantly decreases the size of a counter-rotating eddy that forms adjacent to the stationary wall in the large gap region. Film thickness in a dynamically loaded journal bearing was also measured using eddy current probes. Viscoelasticity associated with polymer additives did not influence minimum film thickness or attitude angle under loading conditions characteristic of an engine cycle. Results in both steady and unsteady flows are at least quanlitatively consistent with predictions of the upper convected Maxwell model.
Just as well really
22 January 2008, 10:08 PM
#83
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£12:99 for 5 Litres ....... why pay more, 6 month changes mean expensive oils are wasted ....
http://www.opieoils.co.uk/images/PRODUCT/large/990.jpg
http://www.opieoils.co.uk/images/PRODUCT/large/990.jpg
22 January 2008, 10:10 PM
#84
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£12:99 for 5 Litres ....... why pay more, 6 month changes mean expensive oils are wasted ....
http://www.opieoils.co.uk/images/PRODUCT/large/990.jpg
http://www.opieoils.co.uk/images/PRODUCT/large/990.jpg
22 January 2008, 10:11 PM
#85
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lol yes I know Andy
Probably of more interest is the oil I use in my own cars.
In the Spec C with a built 2.5 running mid 400's and used daily throughout the summer/winter I run Motul 300v 5/40. In the race car with nearly twice that bhp and used mainly in the summer I run Motul 300v 15/50
So I guess you could say I'm sitting on the fence regards the 0/40 v 10/40 discussion
Probably of more interest is the oil I use in my own cars.
In the Spec C with a built 2.5 running mid 400's and used daily throughout the summer/winter I run Motul 300v 5/40. In the race car with nearly twice that bhp and used mainly in the summer I run Motul 300v 15/50
So I guess you could say I'm sitting on the fence regards the 0/40 v 10/40 discussion
22 January 2008, 10:19 PM
#86
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lol yes I know Andy
Probably of more interest is the oil I use in my own cars.
In the Spec C with a built 2.5 running mid 400's and used daily throughout the summer/winter I run Motul 300v 5/40. In the race car with nearly twice that bhp and used mainly in the summer I run Motul 300v 15/50
So I guess you could say I'm sitting on the fence regards the 0/40 v 10/40 discussion
Probably of more interest is the oil I use in my own cars.
In the Spec C with a built 2.5 running mid 400's and used daily throughout the summer/winter I run Motul 300v 5/40. In the race car with nearly twice that bhp and used mainly in the summer I run Motul 300v 15/50
So I guess you could say I'm sitting on the fence regards the 0/40 v 10/40 discussion
Just kidding.
Actually that's reassuring, thanks Andy. One less thing to worry about : my CEL light came on and stayed on when I gave it some beans tonight (a visit to Chris methinks !)
22 January 2008, 10:36 PM
#87
when have subaru recommended 0W/30 in newage? certainly havent for mine.
I use 10/60 Millers CFS. It copes very well with heat for prolongued track use and I am very happy with it.
I have previously used motul 10/40 and 15/50 - both very good oils but i have always fully synthetic since first service but changed very freqeuntly.
I would rather throw £40 of decent oil away as a precaution than pick out nice sparkley pieces of bearings out of the oil.
But it is your choice if you want to use Tesco Value oil in your car.
I use 10/60 Millers CFS. It copes very well with heat for prolongued track use and I am very happy with it.
I have previously used motul 10/40 and 15/50 - both very good oils but i have always fully synthetic since first service but changed very freqeuntly.
I would rather throw £40 of decent oil away as a precaution than pick out nice sparkley pieces of bearings out of the oil.
But it is your choice if you want to use Tesco Value oil in your car.
22 January 2008, 11:24 PM
#88
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I've been told on numerous occassions by the nice folks at xtreme Scoobies and by Bob Rawle that 10w 50 is A OK for my UK classic.
Apologies for the name dropping, but I've just heard too many people, who have a damned sight more knowledge and experience of these cars than me, saying either a) go for a 10/15w and/or Don't use a 0/5W oil.
Bit of a minefield this, eh!
Ns04
23 January 2008, 09:57 AM
#89
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I think my advice from mow on will be use the grade suggested by Subaru, but go for a proper fully synth ester based oil rather than the semis they suggest (prob only so journalists don't start crying "look how much Subarus cost for a simple oil change" etc..).
Well, either that,
or
"use whatever you damn well want"
Ns04
