Whats your favorite oil for your Grand Prix?
Valvoline, Pennzoil, or Mobil 1 ???

mobil 1 ftw

mobil 1, or royal purple if i was rich

RP when i can afford it

Castrol Syntec 10W-30...if I cant get that then Mobil 1.

about to switch to mobil 1, got the car recently about time for an oil change

i always ran mobil 1 in my 89 f-bird(103K-154K) and the engine still runs fantastic, but I'm guessing all synthetics are good. Just had good experience with mobil 1 so i'm sticking with it.

This question is asked on a regular basis,truth is any good sythetic changed at regular intervals will give you good service so find an oil you like and stick to it,I use Royal Purple in all my vehicles just my preference ,more important is regular changes .Chico(pops)

Mine is Valvoline. I have put this oil on my car over 80,000 miles. No problem for my car engine so it is my favorite oil

I used Mobil 1 for sometime. I love many oil changes. I tried Valvoline, much cheaper. This latest change I tried RP, much more expensive.
Saw it at Wally world for $6.48 a quart, didn't buy. Went to Pep Boys and paid $7.99 like an idiot.
I will stick with regular changes like I was doing. I did try a diff filter this time, Purolator, instead of the frams.
Does anyone know the number for a Purolator filter that is longer, or bigger then the recommended size? Looking for more capacity.

Whatever is on sale.

castrol gtx high mileage

never had anything other than castrol in it and its been goin strong for over a 100k

My baby loves her some RP 10/30 and a K&N 2001 filter

Castrol GTX here as well.

Mobil 1

you sure like spending a lot of money!

Mobil 1, and went with a Mobil 1 filter this time instead of Fram.

I've never heard of Royal Purple until I found this site.

I run the cheapest synthetic I can find. Since Pep Boys closed here, I normally use Walmart's house brand SuperTech 5W-30 synthetic which is $18 for a 5QT jug. Pep Boys always ran rebate deals. The Super Tech's API service ratings match my car's requirements. The Mobil 1 right next to it shares these ratings. If you have a problem with this oil. They sell 5 Qts of Quaker State for $24 and 4 Qts of Mobil 1 for $24. You know Walmart contracrs out with some big oil company to make this synthetic. You never know if it is Valvoline, Quaker State, Penzoil etc. I run the longer Puralator filter and change at 7500 or before if I will hit 7500 on a trip. I check my oil and top it off when it is lower than 1/2 on the dip stick. On average, I add 1/2 a qt in my 7,500 miles. My car has 129K.

My 04 Monte & 03 Motorcycle get Amsoil, but I bought them new and plan to keep them a long time.

My Chevelle get 15W-40 Rotella synthetic because of it's high Zinc content to keep my flat tappet camshaft in good shape.

also amsoil is suposto be a good oil, everyone i know with ATV/sleds/ run it in there toys, and then rp in there cars

I have been using Valvoline Sythetic High Mileage.

walmart supertech. OR Napa brand oil. whatever is cheaper!

if a local parts store is running a rebate, I would go that route too.

oil HAS to meet certain specifications, so why drain the wallet on the high dollar stuff?

On the filter, I don't know the number of the purolator one, but I use the same longer filter on my GP as is spec'd on my 2001 4wd GMC Jimmy, so you can just look that one up in the parts store book.

I use the 4.3L filter as well.

Royal Purple

Castrol GTX here too. I do too much city driving to use synthetic.

sweet crude.

Valvoline MaxLife full-synthetic 10/30 with a K&N filter.

Mobil 1 with Mobil 1 filter. FYI, $9 off a case until 10/26 w/coupon (they usually the coupon at the register) at Costco.

mobil 1