greasemonkey

Might be worth mentioning that Halfrauds currently have an offer on oil. Think it's either 10% or 20% off. Not sure whether they do RS, but you'll have no problem getting the Mobil there.

Failing that, look here.

[Edited by greasemonkey - 9/4/2003 5:01:07 PM]

CEL

iTrader: (1)

I had my car serviced a about a month ago, they asked me what type of oil i wanted, semi synthetic or fully synthetic.

I always thought that fully synthetic was the better of the two, so asked them to out that in. ( dont ask me what type exactly, i need to check what they actually put in)

Anyway, since is been serviced the oil temp has been reaching almost 100 deg c, is this too high for normal town type driving?

It never used to get that high, more like 95 deg c at worst. Is this oil too thin or should i have it changed for semi synthetic?

any help or thoughts would be appreciated

thanks

Chris

greasemonkey

You really need to find out what brand and weight of oil they put in. Some full synths are too thin for these cars (especially the 0W/40 grades), so it's not like any old fully synthetic oil will do the job.

Motul 300V 15W/50, Mobil 1 Motorsport 15W/50, Castrol RS 10W/60, Silkolene Pro-S 10w/50 are all good. First thing you have to find out though is what's in there at the moment.

CEL

iTrader: (1)

okay,

aparently i have Valvoline fully synthetic 5/40W in at the moment.

Im going back tomorrow to have it changed for Valvoline 5/30W.

They tell me its possibly too thick when the oils getting hot and hence the reason for the drop in pressure.

Not knowing a thing about oil, does this make sense?

greasemonkey

No, that's abject b*ll&cks. Oil (even multigrade) gets thinner, not thicker as it gets hotter, so their theory makes no sense. Bit worrying to hear a garage coming out with stuff like this too!

If there's a problem with this oil, it's not likely to be that it's too thick, more likely that it's too thin, and thus them changing for an even thinner grade of the same brand of oil is likely to make things worse not better.

As mentioned previously, the oils that people continually get good results with here are all higher viscosity than what you currently have in your car, so what does that tell you? Suggest you get some of the Motul, Mobil or Castrol and see what that does to your temp and pressure readings.

[Edited by greasemonkey - 9/4/2003 2:26:40 PM]

CEL

iTrader: (1)

hmmmm, yes i agree, think i will keep the name silent for now.

Just phoned them, im going for Castrol RS. Will let you know if it makes a difference when its been changed.

Cheers

Chris

nellie

Getting mine changed from motul 300v 5/40 to motul 300v competition 15/50 tomorrow on a mid-service pre ring visit,hehe

CEL

iTrader: (1)

Ok, trouble sourcing the oil now, Does anyone know where i can get the stuff from?

CEL

iTrader: (1)

cheers greasmonkey

im off to halfords in the morning, see what i can get from them, They told me at the garage that i need 4.5 litres, is this correct?

greasemonkey

Yeah, there or thereabouts. Most full synths annoyingly seem to come in 4l and 1l packs, so you'll be looking at a 4 and a 1. Still, you can save the extra half for the next change, or topping up.

nellie

Halfords only do castrol 0/40 not 10/60.but do mobil 1 15/50,which is just as good if not better.

Adi69

I've just been speaking to quite a few oil technicians to try and get as much info as poss.
From the info I've found.....it's not only the viscosity that make a big difference....but the "base stocks" used for the oil in the first place.
There are 3 types of base stocks used in fully synthetic oils. PAO (Poly Alpha Olefin), Esters and Diesters. PAO are most found in the petoleum based oils....with the other 2 been most associated with jet engine oils. The best of the 3 base stocks is Esters.
There are only 2 oils companies I've found that use only Esters as the base stocks in their fully synthetic oil. 1 is Red Line and 2. Silkolene.
Other companies like Mobil 1 and Millers are a tri-blend oil and use all 3 base stocks.

I have just swapped to Silkolene but used the 5w40 Pro S which is the same viscosity as the Millers I was using before. This way I can compare the quality of the oil and its behaviour rather than the change in viscosity. Straight away in town driving, I have noticed a slightly lower oil temp.