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2005 grand prix oil check

2005GrandPrix

2005GrandPrix

New member
its a dumb question my dip stick has the hash marks with the five dots in the hash marks. so whenn do u know when to add oil if its on the second dot is the good?
 


actually the correct fill for the '05 is right in the middle of the hash. So if you're near the bottom of the hash you're about a half quart low, near the top about a half quart over.
 


I can't keep oil at the top of my dipstick in my '05, I add oil and eventually it will go down to half way and just stay there.
 
2005GrandPrix said:
so if its in the middle its good? gm makes no sense of putting five dots if it only goes to the third.
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Yep. Makes complete sense. The hash is pretty much intended to show *is it in range* and as checking oil levels can often be a range it makes sense for it to be smack in the middle with the correct amount (4.5 qts) at a median temp.

If the car had been recently run, it will likely show a bit low (oil still in the engine not the pan) and then you fill it to the top of the hash, you WILL have too much oil in the car.

Running too much oil in my experience has never been a good thing, it actually robs you of a small amount of power because the engine has to work that much harder to move the rotating assemblies. Truthfully running a tiny bit low will usually yield a small hp gain. ;)
 
starscream5000 said:
I can't keep oil at the top of my dipstick in my '05, I add oil and eventually it will go down to half way and just stay there.
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Rings are getting worn allowing some blow-by that's getting burned in the combustion chamber. Pretty normal...and guessing you have near six figures on the OD or more?
 


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