High milage oil?

**SleepingZ28** · 05-01-2008, 12:05 PM

Hey guys, not sure if this goes here but...

I just bought a 2000 Z28 M6 and it has about 139,000 miles on it. I want to get the oil changed but not sure what to use. Ive been around cars/engines a long time but new to the LS1 scene. What oil do you guys recommend for my car? I live in FL and usually run 10w-40 in my other cars.

Any brands you recommend?
Any specific types?
From my knowledge, the car has never had synthetic in it.

Thankyou for your input.

**WS6ICK2K** · 05-04-2008, 04:12 PM

On many oil analysis tests on LS1's Penzoil Platinum had a better shear rate compared to mobile 1, and its cheaper. I would recomend PP 10w30 which is a synthetic.

**BowlingSS** · 05-04-2008, 04:43 PM

I would use German Castrol 0W30 synthetic and a K&N 2006 filter.

Good luck.
Bill

**Sarge** · 05-04-2008, 04:46 PM

Originally Posted by SleepingZ28

Hey guys, not sure if this goes here but...

I just bought a 2000 Z28 M6 and it has about 139,000 miles on it. I want to get the oil changed but not sure what to use. Ive been around cars/engines a long time but new to the LS1 scene. What oil do you guys recommend for my car? I live in FL and usually run 10w-40 in my other cars.

Any brands you recommend?
Any specific types?
From my knowledge, the car has never had synthetic in it.

Thankyou for your input.

What OCI's ( Oil Change Intervals) you going to be running?

**SleepingZ28** · 05-04-2008, 05:02 PM

I would say every 3k unless I really need to do it sooner. Its stock and won't see much track time, maybe once a month or less.

Thanks for the input. Might go with the PP10w30 or 40.

Do you guys think that going synthetic will cause any problems(leaks)?
Can it hurt? or only help?

Thanks again.

**BowlingSS** · 05-04-2008, 05:39 PM

Originally Posted by SleepingZ28

Do you guys think that going synthetic will cause any problems(leaks)?
Can it hurt? or only help?

Synthetic is always better.

Bill

**Sarge** · 05-05-2008, 12:25 PM

Originally Posted by SleepingZ28

I would say every 3k unless I really need to do it sooner. Its stock and won't see much track time, maybe once a month or less.

Thanks for the input. Might go with the PP10w30 or 40.

Do you guys think that going synthetic will cause any problems(leaks)?
Can it hurt? or only help?

Thanks again.

The synthetic oils cause leaks is a myth of biblical proportions. Works like this....many moons ago folks used conventional oils with shitty add packs ( detergents/VI etc.) were damn near non existent...then they put in synthetics and viola! The synthetics had kick that ass add packs and cleaned all the crud around the seals and of course once the shit was cleaned off it leaked....thus the "myth" synthetic caused the leak...no the shitty conventional oil did.....you don't have to worry about todays conventional oil as they have excellent add packs on equal to
synthetics. For 3K OCI's I would seriously consider just running a 10-30 conventional...PP is such a good value with excellent returns though...hard to pass it up....

**BeerMan** · 05-06-2008, 01:25 PM

I have always had great luck with Amsoil synthetics. I run Amsoil with everything(engine, transmission, rear diff, motorcycle, race cars) and it has proved itself over and over again compared to conventionals.

**BowlingSS** · 05-06-2008, 03:37 PM

I have never used Amsoil synthetics but I have always heard good reports. I think you have to order Amsoil if I rem right.

Bill

**BeerMan** · 05-06-2008, 03:42 PM

I work part time for a shop that handles Amsoil so it is quite easy for me to get it, not to mention that I get a discount. But there are dealers that handle it so it doesn't have to be ordered online.

**BlueMagicSS** · 05-07-2008, 07:38 PM

you'll be fine with synthetic... I just started running Royal Purple and haven't had any problems. I've heard that Amsoil is pretty good too... just my .02 cents

**SleepingZ28** · 05-07-2008, 07:51 PM

Thanks guys, i went with PP 10w-30. Seems to be fine. no leaks. runs good. oil pressure drooped slightly because it had 10w-40 in it and the synthetic is more slippery.

**KennethS** · 05-12-2008, 09:15 AM

Originally Posted by SleepingZ28

Thanks guys, i went with PP 10w-30. Seems to be fine. no leaks. runs good. oil pressure drooped slightly because it had 10w-40 in it and the synthetic is more slippery.

You can probably increase you oci when you run synthetic. If you really want to get anal-ytical about it, contact Blackstone Labs and they will send you a free oil sampling kit. Just run your car to like 4k miles with that single oil change (and record any oil you may add during that time), send in the sample with $30 (standard is $20, but you want to additive check $10), and they will email you the report. Like when I did my 2.7 Intrepid I rebuilt, the report stated there was nothing unusual and I should keep running and send in another sample 1k miles later, the 5w50 Syntec I was running turned into 5w40 too. You are driving an old vehicle, so they will be able to see if there are any problems with your engine too (leaking coolant, excessive blowby, wear).