Engine Oil

[JasonR]

Do you really want to take advice from someone who believes hicks use Amsoil. I must be a yuppy hick from the city! :bounce:

[A//// Guy]

I dont take advice about oil from someone that doesnt believe in synthetic period... :stick:

[JET]

Originally posted by JasonR@May 6 2004, 07:01 PM
Also synthetic is thinner, so can get to other regions of engine that normal oil cannot.
Synthetic oil is not actually thinner, it is just more slippery because of the lack of impurities in it. If it was thinner it wouldn't be the same weight. I have used many different kinds of synthetic. Amsoil seems alright, but like someone stated, the batches vary. I seemed to have settled on Valvoline synthetic for now. Castrol used to rock a few years ago, but they are not a true synthetic any more (they use a cracked hydrocarbon base). Mobil 1 is good, but does not have a lot of additives and my cars like to lifter tick with it in there.

[Halon]

OK so now for those of us with high miles, what is the best thing for us to do. I've heard it's bad to switch to synthetic on a higher milage engine because like you said, it can get into places other oils can't, which in turn can clean out any little tiny build ups that are actually aiding in sealing up certain parts of the engine. So all a sudden u have leaks from all over. That's what I've heard. I don't think I've ever owned a car that had less than 90k miles on it, so I've never used Synthetic because I have heard this. My talon has like 102k on it, so I just run Valvoline 10w30. I'm afraid to switch to sythetic for the above reasons. Anyone here an oil god that can maybe gimme a little advice?

Also I wish there was a study like this on regular oils since that's what I always seem to use. Anyone know of somewhere with a study on regular oils?

[JasonR]

I just would not change to synthetic because miles on engine. I used the word thinner before. Yes oils are same weight synthetic compared to regular oil. Basically I drove 700 miles on new engine, then changed to synthetic and a little oil got past rings, I got a little blow by. Can tell when look at spark plug. By next oil change engine is used to synthetic. Mabey change to valvoline max life.

[Halon]

Thank for advice. You talk good. I am job.

[Super Bleeder!!]

hahaha, ohhh gotta love the Engrish speakers.

anywho, i am a Mobil 1 devotee

when i received my old maxima at 170k, i immediately switched to Mobil 1 and it never leaked a drop up to its 212k demise (water pump)

i just trust it, and it seems like all the new kick ass cars come with Mobil 1 from the factory. plus you can buy it in 5 quart jugs! wooot

[1Fst14B]

who cares? most DSM's break before the the oil change interval anyways, or leak it out, or whatever....

but i guess i do use M1 on my new car, not sure why, just do.

[Matt D.]

It is not recommended to change to synthetic on a high mileage engine when it has been running standard oil forever. The reason is because synthetics contain detergents that clean away oil deposits in the engine. These very oil deposits are what are sealing up worn gaskets and seals preventing oil leaks. If you switch to synthetic on an older engine you will most likely start experiencing very small oil leaks.

Jason, if you got blowby on an engine after 700 miles it doesn't magically disappear. You would also notice smoke coming from your exhaust before you'd see anything on your sparkplugs.

[JasonR]

Mabey, must not have had blow by, noticed a little oil last year on spark plug after first use of amsoil, next oil change, nothing. Certainly never saw smoke. I do agree that should not change to synthetic after you have been running regular for long time. :3gears: