What kind of oil?

[pinkcookies26]

Ive been using Castrol Full Synthetic 10W30 in my 02 GTP. What kind of oil do you ya'll run. Any idea whats the best for that motor and why? Thanks.

[bocoogto]

I run Mobil I 10W30 in my '07 Grand Prix GXP and all my other cars, including my wife's '64 GTO. Have had very good luck changing oil and filter twice per year, which is about 4000 miles on my '07. My '93 Buick Roadmaster, which has a small block Chev 350 has 147,000 miles, and has been on Mobil I since it was new. No oil usage at all.
I've been an advocate of synthetic oil since the early 80's and have had no issues with it.

[joe92k1500]

I use Amsoil 0W-30 and filter in my 05 GXP. Great product, and I agree, synthetic is the only way to go. What your using now should be fine.

[CrazyHorst]

The L36 and L67 motor are validated on (and factory-filled with) a Texaco 5W30, I use Castrol 5W30 but switched over to 10W40 plus a bottle of STP for my big block as it has a little heavier service (always towing a full or empty trailer). I go 4000-5000 miles between changes (less for the big block as all of them use some oil).

I use synthetic for air-cooled engines like a Briggs & Stratton.

[wlkjr]

I've used non-synthetic Havoline 10W30 since the first oil change and I have 347,000 miles on mine now. Still doesn't use any between changes and the last oil analysis was good.

[grandprixgtx00]

everyone has their own opinion. i run Valvoline 10W30 in the summer, and being in Wisconsin in the "Frozen Tundra" and all...i use Valvoline 5W30 in the winter, the lighter weight makes for easier starts on the cold mornings.

i always said Oil is oil...as long as it lubricates the motor, and you change it on time its going to do its job. i just try to stay away from the oil's with alot of additives though.

[00GTP4ME]

Originally Posted by pinkcookies26

Ive been using Castrol Full Synthetic 10W30 in my 02 GTP. What kind of oil do you ya'll run. Any idea whats the best for that motor and why? Thanks.

I would say you're running a high quality oil. I'd stick with it if I were you and can afford full synthetic!

[tblake]

Originally Posted by 00GTP4ME

I would say you're running a high quality oil. I'd stick with it if I were you and can afford full synthetic!

Funny you say that. I just bought 5 quarts of valvoline 10w30 for 3.69 each. The Valvoline full synthetic sitting right next to it was only 5.29. Thats only about 1.50 more per quart, 7.50 more per oil change. I think we can afford that every 3,000+ miles.

[BNaylor]

Originally Posted by CrazyHorst

The L36 and L67 motor are validated on (and factory-filled with) a Texaco 5W30

5W-30?

If that was true why does GM recommend using 10W-30 for most driving and weather conditions in all GM cars with both the L36 and L67 engines. 10W-30 has always been the preferred viscosity. 5W-30 is fine as long as the temperature goes and/or stays below 60 degrees F.

I use Mobil 1 10W-30 in my GTP.

[doctorhrdware]

With GP that have higher mileage, should you use a high mileage motor oil.

[grandprixgtx00]

Originally Posted by BNaylor

5W-30?

If that was true why does GM recommend using 10W-30 for most driving and weather conditions in all GM cars with both the L36 and L67 engines.

yeah, the only GM that i know calls for 5W30 is the grand am with the 3400. my 2004 grand am said SAE 5W30 right on the oil cap.

[BNaylor]

Originally Posted by grandprixgtx00

yeah, the only GM that i know calls for 5W30 is the grand am with the 3400. my 2004 grand am said SAE 5W30 right on the oil cap.

Yeah same with my son's Olds Alero GL2 with 3400 V6 SFI engine. 5W-30. And I would stay with it too since these engines suffer from piston slap.

[grandprixgtx00]

Originally Posted by BNaylor

And I would stay with it too since these engines suffer from piston slap.

haha, yeah...never was a fan of the 3400. had my Grand Am for a little over a year, and traded it in

[tblake]

Bob, thats sure a clean looking motor. Do you keep all your motors like this? Are you selling any vehicles anytime soon? HA HA

[00GTP4ME]

Originally Posted by tblake

Funny you say that. I just bought 5 quarts of valvoline 10w30 for 3.69 each. The Valvoline full synthetic sitting right next to it was only 5.29. Thats only about 1.50 more per quart, 7.50 more per oil change. I think we can afford that every 3,000+ miles.

Ok moneybags! j/k.