Oil Type?, what type is best Options

[Praying_Mantis]

i haven't changed my oil since i bought my car a while ago so i think i'd better give it a service. Just wondering what the best type to use is ie. synthetic, semi synthetic or a good quality non synthetic? cheers

[Bigmeanbulldog55]

hell it could be because the synthetic cleaned away the varnish and sludge that was holding the engine together :lol:

You laugh at this but the cleaning effects of synthetic and its ability to break down sludge that has plugged spots where oil would leak is PRECISELY the reason I understand why people sometimes develop a leak after switching to synthetic on a high milage engine.

This is also exactly why you need to switch you oil at about 500 and then 1000 then 1500, after switching. That slug it breaks loose can plug up your system and cause you to have no oil. This is very important. Synthetic oil lubricates a lot better than regular oils, and it cleans. Anything that cleans and breaks up slug will undoubtedly have the ability to assist in the engine leaking. I would rather have a car leak on synthetic than not leak on regular. At least you know it's clean.

btw, it's Castrol that has an organic base. But it still works like a synthetic, and pretty much is one. I've never heard that Mobil one is like that, but if it is, I don't think that really matters. It's all about how it preforms.