Mobile 1 synthetic overview.

[FE3-323]

im not understanding the fact of synetic ...... if it hurts to remove it early like regular oil... then wouldn't it be causing damage to your motor until it fully breaks down???

[D323]

Its not that it damages the motor. Its more that by removing the full synthetic oil before it has had a chance to break down and coat the internal parts properly, you are denying the motor its full potential to run at its peak.... Its kind of the same principal behind running medium vs high octane grade gas.... Yes the medium is cheaper, but the high grade will help your motor be at its peak and tends to promote a healthier engine in the future.

[FE3-323]

so basically syntetic is the same as regular until it begins to break down... then it becomes better??

[D323]

Synthetic is more viscous and is better for cold starts.... Synthetic, from my understanding, coats the engine parts better and provides better protection against wear and in return increases engine life. Synthetic blended oils tend to break down faster and this in turn causes them to not protect the motor as well as they should. The synthetic takes longer to breakdown. During this process varnish and other chemicals in the oil are released. Since the oil takes longer to breakdown more of the desired chemicals are deposited.

[FE3-323]

well my motor currently has 5,237 miles.... i've been running regular from 4k on up... and from the factory they run regular as well. what do i have to do to change my motor over to fully synthetic???

[D323]

nothing different than an ordinary oil change. Get a good filter and stay away from lucas oil, and castrol syntex... those as discussed in this thread earlier are not actual synthetic oils and got their "synthetic" label through paying off politicans.

[goldstar]

so basically syntetic is the same as regular until it begins to break down... then it becomes better??

No, fully synthetic engine oil is superior to any mineral-based engine oil right from the start and continues to maintain that superiority over time and usage. Also, let me correct an erroneous statement that I made earlier in this thread where I stated that Mobil 1 and Amsoil were not fully synthetic oils. I have since learned that I was wrong. Mobil 1 and Amsoil are both fully synthetic oils so if you're looking for the real deal, they'll both fill the bill.

02 DX Millenium Red

[FE3-323]

so now mobil 1 is fully synthetic??? is regular lucas bad to add to regular oil??

[goldstar]

so now mobil 1 is fully synthetic??? is regular lucas bad to add to regular oil??

Mobil 1 and Amsoil are both full synthetics because they consist of synthesized hydrocarbons derived from Polyalphaolefin (PAO) base stocks. I mistakenly thought the opposite because of my own previously imperfect understanding of the chemistry involved.

Why would you want to add Lucas to a mineral oil? What would be the point or advantage? It seems to me, one should use either a full synthetic oil or a mineral-based oil whatever one's preference. Mixing two different brands or types of oil, even of the same viscosity rating, can result in problems because of possible incompatibility of the additive packages and is therefore best avoided.

02 DX Millenium Red

[loganss]

Damn reading some of your responses make me feel really stupid.

If all this talk of synthetic oil, such as mobil one, is true, I don't see why people wouldn't use the stuff. The benefits seem to outway the cost before I read these articles and responses, so now I will insist on nothing less for my car.

Thanks for the info guys.

[goldstar]

:If all this talk of synthetic oil, such as mobil one, is true, I don't see why people wouldn't use the stuff. The benefits seem to outway the cost before I read these articles and responses, so now I will insist on nothing less for my car.

Thanks for the info guys.

I completely agree with you. The many benefits gained from using synthetic oil make its extra cost worthwhile, IMO. While it's considerably more expensive than a mineral oil, its cost will to some degree be offset by somewhat better fuel mileage, more extended oil change intervals and less engine wear over the long run.

02 DX Millenium Red

[FE3-323]

by lucas.... i meant the additive for mineral oil.... (100% petroleum)

[ProjectProtege]

So this mobil 1 5w30 supersyn formula would be the best for a 159,412 91motor... Im goin to be changin my next week... i want my motor to last a long time...

[goldstar]

So this mobil 1 5w30 supersyn formula would be the best for a 159,412 91motor... Im goin to be changin my next week... i want my motor to last a long time...

According to the Mobil 1 website, I believe your best bet would be to use 10W-30 SuperSyn multi-vehicle formula rather than the 5W-30. Mobil recommends the 10W-30 for older, higher-mileage cars and the 5W-30 for newer vehicles. However, in their application guide they do list both these oils as suitable for a 91 Protege. You could also use Red Line 10W-30 or Amsoil.

02 DX Millenium Red

[ProjectProtege]

I usely use 10w30 gtx high mileage...