I change my Mobil 1 every 6 weeks!

I think I may try changing it more often because it is fairly dark even after 1 1/2 months.

The rear main seal leaked on the 403 in my old 79 Formula, what an effing pain in the arse to change!

How many miles are you putting on this beast in 6 weeks? The dark color of the oil only means it'* doing the job it was intended to do i.e. keep the engine clean and well lubed and keep the dirt in suspension until the next oil change. If you said that this was good ol' Dino juice, I might go along with you. But this is the premium high priced Full Synthetic Oil you're dumping wayyyy too soon. But don't argue with me. I'm just a cheap ol' *.O.B.

I neglected to mention, I drive just shy of 500 miles a week. I have to change it that often. But I buy my Mobil 1 from WalMart and my good ol' PF47 for $4. I figure $27 every 6 weeks to keep my car running strong for years to come is well worth it.

@2000SilverBullet,


I would only change it to get that 15w50 outa there, if not for that reason
i would not change it, one year oil is perfictly fine.

by the way try some 10w30 syn. or 5w30 thats probly what the owners man. states,
thick oil is a thing of the past....

well then it needs to be fixed,not a band- aid....

100k is not alot of miles eather,,far from it

My plan was to pull the engine this winter and rebuild it with some new aluminum heads but my plans changed when I bought the Gen V.

The engine rebuild willl have to wait another year. So for now it'* a little thicker oil. At least it'* not burning any.

I changed the seal once a few years ago and now it leaks worse.....a couple oz puddle every time I park.

What about this stuff?


It seems with the type of driving you do (which is somewhat similar to my mostly highway driving) you really don't tax your oil that much. You could safely go 10 to 12 weeks with Syn Oil. But this is really a subjective topic. Everybody does what they deem best for them and their car. As long as it helps you sleep better at night.

Paul how about mixing some synthectic with some dino oil ,
I used to due that with my old cars
what your doing now just seem like overkill to me, IMPO