In Reply to: Re: Mobil1 oil? (more) posted by Jon on January 22, 2002 at 14:10:06:
They asked someone who regularly works with these cars. His recoomendation was that oil grades of 10W/30 be used and that ordinary Mobil 1 and grades at 0W or 5W were too thin.The suggestion was a good quality mineral oil like Duckhams Hypergrade would be fine.
Whilst it is 'ridiculous' to suggest that engines 'like' something it is also 'misleading' (IMHO) to believe synthetics 'protect' an engine better simply because they are synthetic. The advantage of synthetics ( as I understand it)is that they retain their properties LONGER.
However, if (as most enthusiasts seem to be doing here) one is changing the oil every 3000 miles or so this probably obviates the need to use synthetics.
It is also true that synthetics lead to more leaks by seepage past gaskets as they tend not to be absorbed and therefore do not lead to expansion of the gasket.
The above two should make one question whether it's worth the considerable extra cost of synthetics such as Mobil 1 if one is prepared to change oils frequently?
I think much of the 'oil debate' centres around a lot of 'myth' just in the same way as the old 'myth' of 100K mile cam chain replacement?
Just my 2 cents worth.
To say that an engine "doesn't like" synthetic oil is somewhat ridiculous. Synthetic oil is superior to conventional oil in all respects. Also 15W50 Mobil 1 is not "too thin."
Synthetic oil is much more stable than conventional oil. One on its major benefits is that it works almost as well at 5000 miles as it does when you put it in. The main reason for changing synthetic oil is contamination by combustion blow-by, etc.
The only problem synthetic might cause is when you switch from regular oil to synthetic after some time. You might get oil leaks. This is because conventional oil is soaked up by gaskets which then expand whereas synthetic is not soaked up to the same degree. So, after you switch to synthetic, the gaskets can dry and shrink back down causing leaks. Then, you just have to replace the gasket.
I think the benefits outweigh the risks (leaks). Good synthetic oil protects your engine much better.
Anybody have any views on using Mobil 1 Motorsport in the S14?
I've seen quite a lot of stuff about not using regular Mobil 1 (as it's too thin) but I recently read an article that said S14's don't like synthetic oil of any description.
Anyone like to clarify this for me so I can sell the Mobil 1 Motorsport to my mate with the Cossie if need be.