motor oil

[PONTIACGTP05]

what would be the best motor oil for my 05 grand prix gtp???

[imdaman3]

10W40 castrol gtx sythetic

[djrepoman]

royal purple, or amsoil iMO

[1LoudGrandPrix]

10W40 castrol gtx sythetic

5W30 it says it on the engine...... and in the manual

[Bio248]

5W30 it says it on the engine...... and in the manual

running thicker oil will just keep the engine components coated more evenly and allow you to keep higher oil pressure. i ran 10w40 in my car and loved it in comparison to the 5w30 that it recommends. dont take everything the manufacturer says for granted.

basically any oil you buy with your own money will work, how good of oil (read expensive) you want to buy is up to you.

[imdaman3]

5W30 it says it on the engine...... and in the manual

i think u mis read it when it clearly says 10w30 rite on the cap of any 3800

[1LoudGrandPrix]

i think u mis read it when it clearly says 10w30 rite on the cap of any 3800

no on 04+ IIRC

[imdaman3]

no on 04+ IIRC

lol my bad i didnt see the 05 but yea runin thicker oil is less wear and tear on the motor in my opinion