Engine Oil Viscosity
23 October 2013, 10:14 AM
#61
What about semi synth vs fully synth?
You can't seem to get 10W 40 fully synth. So would I be better to use 5W 40 fully synth or 10W 40 semi synth in my 2007 Hawk STi?
Car has 33K miles on it has filter, decat exhaust, fuel pump and remap to 350. Not showing any signs of too much burn off.
Usage is frequent short runs w th as much abuse as possible given the chance
You can't seem to get 10W 40 fully synth. So would I be better to use 5W 40 fully synth or 10W 40 semi synth in my 2007 Hawk STi?
Car has 33K miles on it has filter, decat exhaust, fuel pump and remap to 350. Not showing any signs of too much burn off.
Usage is frequent short runs w th as much abuse as possible given the chance
There are a few synthetic 10w-40s, but more synthetic 5w-40s as more modern cars require a 5w-40 than 10w-40. I'd go for a 5w-40 and give it the benefit of better cold start protection.
Cheers
Tim
25 October 2013, 09:09 AM
#64
It doesn't matter how old that article is, as it proves, a lower viscosity oil and therefore less internal resistance, allows the engine to generate more power as it runs more efficiently.
John still works for Fuchs, although it's on a part time basis.
John still works for Fuchs, although it's on a part time basis.
25 October 2013, 09:19 AM
#65
problem is its mis-leading in terms of general use, as even most race teams won't run on v.low weight oil for full race distance often only using for ONE banzai qualification lap
and it also doesn't take into account the re-build schedules and maintenance involved in these engines as well as often higher tolerances to reduce resistance which means for 99% of people its not feasible to replicate without factoring the extra potential for wear/failures
and it also doesn't take into account the re-build schedules and maintenance involved in these engines as well as often higher tolerances to reduce resistance which means for 99% of people its not feasible to replicate without factoring the extra potential for wear/failures
25 October 2013, 10:05 AM
#66
problem is its mis-leading in terms of general use, as even most race teams won't run on v.low weight oil for full race distance often only using for ONE banzai qualification lap
and it also doesn't take into account the re-build schedules and maintenance involved in these engines as well as often higher tolerances to reduce resistance which means for 99% of people its not feasible to replicate without factoring the extra potential for wear/failures
and it also doesn't take into account the re-build schedules and maintenance involved in these engines as well as often higher tolerances to reduce resistance which means for 99% of people its not feasible to replicate without factoring the extra potential for wear/failures
25 October 2013, 11:01 AM
#67
Did either of you read the article? John did mention that the thinner grades may not offer as much protection in certain circumstances and that the test was done on engines belonging to race teams where rebuild costs are not an issue.
What do we get out of recommending the wrong grade of oil for a car? Is there any benefit in it for us? No. Are we still in business and haven't been sued for ruining people's cars? Yes. Therefore, I'd say we know what we are talking about and offer good advice. If you go on some other forums, where there are people that work for oil companies as well as with their own cars, they generally agree with our advice. But we're just salesmen and don't know anything.
What do we get out of recommending the wrong grade of oil for a car? Is there any benefit in it for us? No. Are we still in business and haven't been sued for ruining people's cars? Yes. Therefore, I'd say we know what we are talking about and offer good advice. If you go on some other forums, where there are people that work for oil companies as well as with their own cars, they generally agree with our advice. But we're just salesmen and don't know anything.
25 October 2013, 02:42 PM
#70
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As people can see from my "posts", this is my 1st.
So my first question - why must people get so personal?!
My question to Oilman, I have a recently bought 05 2.0 WRX PPP with 65K.
Usage - mostly dawdling about with the odd blast around the Beacons.
Recommendations please.
Terry
So my first question - why must people get so personal?!
My question to Oilman, I have a recently bought 05 2.0 WRX PPP with 65K.
Usage - mostly dawdling about with the odd blast around the Beacons.
Recommendations please.
Terry
25 October 2013, 03:05 PM
#71
Hi Terry
With that kind of use, a 5w-40 is ideal
http://www.opieoils.co.uk/c-656-5w-40.aspx
Out of those, the best ones are the Fuchs/Silkolene Pro S, Millers CFS/CFS NT, Motul 300V, Redline and Gulf Competition. The Motul 8100 X-Cess, Millers XF Longlife, Fuchs GT1 XTL/Supersyn, Gulf Formula G, Shell Helix and Mobil Super 3000 are good, cheaper alternatives.
Cheers
Tim
With that kind of use, a 5w-40 is ideal
http://www.opieoils.co.uk/c-656-5w-40.aspx
Out of those, the best ones are the Fuchs/Silkolene Pro S, Millers CFS/CFS NT, Motul 300V, Redline and Gulf Competition. The Motul 8100 X-Cess, Millers XF Longlife, Fuchs GT1 XTL/Supersyn, Gulf Formula G, Shell Helix and Mobil Super 3000 are good, cheaper alternatives.
Cheers
Tim
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