Mobil One too thin?????

[Adam H.]

Hi all,
I just read over on LS1tech.com on a conversation about Mobil
One 5w30 being too thin for the LS1 engine.
I have been using it since I bought my 2002 Firehawk and I don't
want something to go wrong with it.
I had no problems that I can tell yet. I change my oil every 3 months because of habit. I never reach 3,000 miles. I use Mobil
One 5w30 tri-syn. and K&N oil filter.
Any suggestions?

Thanks,
Adam H. 2002 T/A Firehawk #536 M6

[JeffY]

It comes with Mobil 1 from the factory - GM has used it on Vettes since C4 and the F-car started using it in 02. Its OK. You don't need to change syntehtic every 3000 miles-it doesn't break down like dyno oil. As long as the filter is catching all of the junk in the oil, no problem.

[Joe 1320]

the thickness of the oil is the same whether it is synthetic or non sythetic, the 5w-30 rating is there for a reason. The real debate is in regards to high mileage engines. The physical molecule of the synthetic oil is smaller and may start leaking past the seals in high mileage motors. Mobil 1 came out with a high mileage formula to combat this problem.

[wolfdogs]

i got a nice ocean front piece of property to sell you in Nevada...interested?

[N20LT4Bird]

Originally posted by JeffY
. You don't need to change syntehtic every 3000 miles-it doesn't break down like dyno oil. As long as the filter is catching all of the junk in the oil, no problem.

The lubricating properties of synthetic oil don't break down, but the ADDITIVE packages do, just like conventional oil. Anti-foam additives, oxidation inhibitors, detergents etc.. all break down and should be changed every 3 thousand. Dont buy synthetic oil so you dont have to change it, buy it because it lubricates better.

[JeffY]

Originally posted by N20LT4Bird
The lubricating properties of synthetic oil don't break down, but the ADDITIVE packages do, just like conventional oil. Anti-foam additives, oxidation inhibitors, detergents etc.. all break down and should be changed every 3 thousand. Dont buy synthetic oil so you dont have to change it, buy it because it lubricates better.

I believe GM changed their oil change requirements with synthetics from 3000 to 7500. Had tp ass EPA regs. before they could do it - took a while.

[N20LT4Bird]

The reason why they say 7500 is to pass EPA regs. Also, when the consumer looks at the cost per mile to operate the vehicle, it appears cheaper as oil changes are twice a year instead of 4 times. Im still changing every 3 thousand. Too much $ wrapped up to let my engine run on 6 mos. old oil.

[wolfdogs]

we (feds) are doing a serious new study on the "lifetime" of oil. there is a comprensive study already done, its called the "Oil Bible" or something simular. its online and not cheap. we ordered the book, from what we here, it has some merit. i have the site bookmarked at work, not home, otherwise i would post it.

right now, we (GSA fleet) alow a 7500 mile interval for oil changes on 11,500 gvw below gas engines. this was OK'd by the big three as well. the only thing we dont fudge is the GM oil minder program....if its a gm..and the light goes on, its not ignored, the change is done. warranty issues would arise if not. of cource the alternate fuel vehicles have some strict requirments that must be followed.. but then you have to "use our oil" says D/C and Ford... but we are working at that...thats a money maker for them...

its a big game out there... i too changed every 3k for cheap insurance. im going to stretch that now by 1 or 2k i believe. the new synthetics hold up very nicely. Ft Belvoir, u.s. army facility in VA, does all the oil anaylisis testing for DOD and i've been able to get my hands on some of thier reports..

tell ya..im getting ready to do the first oil change in the Envoy.. and 6.5 qts of mobil 1 is not a cheap sunday afternoon!

[Bandit]

Since I converted the car to Mobil 1, I'll let it go between 5-6 before an oil change now. ( of course I use a qt every 3-4K )

Most manuals say, between 6-8K as a suggested oil change. I would say that should be normal since they warranty the motor.

I use a synthetic oil filter, has anyone heard anything about them?

[Barry 94Formula]

I upped mine to 4K, I would go to 5 but I have the 160 stat and there was some concern about the low temps not burning off the impurities in the oil.

[wolfdogs]

Originally posted by Bandit
Since I converted the car to Mobil 1, I'll let it go between 5-6 before an oil change now. ( of course I use a qt every 3-4K )

Most manuals say, between 6-8K as a suggested oil change. I would say that should be normal since they warranty the motor.

I use a synthetic oil filter, has anyone heard anything about them?

synt oil filter....yes, i heard they were exspensive and overkill... i use the stock gm filter. like.....on sale for 2.48 man.... like....

[magnethead794]

as for how long oil can last, the dually goes 3 years between changes without problems. and it's a very high milage motor, into the odometer flipped 2 or 3 times so far. so yes, oil can last a long time.














of course, the dually is a farm truck/ boat hauler, and rarely gets driven, so the oil sits most of the time.