What weight engine oil do you run?

I use 20W50, but I only run my car in the Summer/nicer months, and it is supercharged, so it runs pretty hot. Recommended by famed Mustang tuner Joe DaSilva.

I run 10w40 since I do alot of highway miles on the car. I can't remember where... maybe on here, I researched it and just gave it a go... only reason my valvetrain has noise is because I have a loose rocker.... gotta tighten it up... otherwise never had an issue.

10w30 and a motorcraft filter. never had a problem. will NEVER run a fram

Just Castrol 5w-30, $11 for 5 qt's at wally world, along with a motorcraft filter. I change oil every 2500 miles, so synthetic isn't worth my money.

I run 10-30 synthetic and a pure-one filter. no noise and spot on oil pressure.

tannerc91gt said:

10w30 and a motorcraft filter. never had a problem. will NEVER run a fram

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the advice in this thread topped out right here, fram filters are junk. if your spending 7+ bucks a quart for oil then pony up for a good filter.

I run 15-40 or 20-50 oil and Motorcraft filter. Car is turbocharged.and sounds like a sewing machine.but I run my valves a bit on the lose side

20w-50 castrol high mileage....gave me another 10-15psi at idle over 10w-30

lancec2c30 said:

Just Castrol 5w-30, $11 for 5 qt's at wally world, along with a motorcraft filter. I change oil every 2500 miles, so synthetic isn't worth my money.

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I no of a test that was done and castol GTX came out the worst. my friend recently freshened up his engine(honda) and it has 280,000 miles on it. when we tooks the pan off and valve cover every thing looked brand new nice and clean no crud built up. he uses halvoline and runs it in all his race cars and swears by it...halvoline is just advanced autozone brand. I have also seen a handful of cars from people switching from non-synthetic to synthetic and having issues, then they switch back and problems go away.

some cars are indeed picky, my lexus sc400, does not like anything other than mobil 10w40, and 91 octane.... but my wife loves the darned thing.....

TenorPlayinGuy said:

some cars are indeed picky, my lexus sc400, does not like anything other than mobil 10w40, and 91 octane.... but my wife loves the darned thing.....

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our Xb wants 5-20 or 0-20 full syn.

I hear for hi-performance engines 5w40 is the way to go for NA or forced induction

went to the parts stores to get a bypass hose (hate that damn thing) for the vert and some oil for the oil change after we change the intake gaskets.
motorcraft 10w30 syn-blend
parts stores = 3.99 a qt but they had 5w20 in the five qt jug for 18 bucks
Wal-Mart = 2.77 a qt, they had the jugs of 5w20 but thats not what i was buying so i didnt notice teh price.
Wal-mart FTW

10W30 Mobil 1 synthetic.