Mobil 1

[Jimbo]

My son bought a 99 Grand AM with 89000 miles.
Is it to late to start useing Mobil 1 ???

I wanted him to get a Cruiser. Thought it would
be cool if he got a red one than we would have
three, red white and blue. I even offered to
help pay for it.

[Sci-Fi]

Technically no, it isn't too late to switch. But you should be aware that a synthetic oil has better additives in it and will start cleaning out/removing any deposits or sludge that may be currently stopping any oil leaks. Some like to use/add auto-rx in the oil for about a 1,000 miles then change the oil and filter and switch over to synthetic oil. The auto-rx will clean out most of the deposits and sludge.

A lower cost option for a car with that mileage would be to use a synthetic blend oil or use Rotella-T Synthetic, available at Wal*Mart and is reasonably priced.

[gonzomania]

How about the new high mileage oil that is being sold for higher mileage cars.

[Sci-Fi]

Pennsoil 5w-30 high mileage oil seems to have good review and additive package. At Bob the oil guy's site, the specs look better than regular Pennsoil 10w-30. But compare the pricing, you might be able to buy a synthetic or synthetic blend for the same price.

[bigtommy83]

Synthetic oil is also a lot more slippery. It will start leaking past some of the seals (camchaft, crankshaft, valve cover) that convential oil does not. The higher mileage stuff has detergents like tranny fluid to help clean the motor.

[Gary04GT]

quote:Originally posted by Jimbo

My son bought a 99 Grand AM with 89000 miles.
Is it to late to start useing Mobil 1 ???...

If it were my car don't think I would do it. With that many miles on the engine just using a good 10W-30 oil would be more cost-effective and work just fine.

[bigdogdad]

Gary04GT kinda hit it on the nail, new or old, just changing the oil on a regular basis will extend the life of the car.

[Grouch]

If you change your oil when you should your chances of an engine failure are very small no matter what kind of oil you use. I've seen plenty of engines with way over 100 K that were clean as a whistle when they were torn down.

[okieGT]

Since were are on the topic of synthetic oils, I heard an interesting comment today. One of my employees swears that her MPG went up from 17 to 21 in her Explorer. Any thoughts? I call bull, but what do you think?

[p.schuh]

Hi okieGT!

If you use synthetic oil, your gas-mileage will be better (4% - 8%).

Peter [8)]