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Re: 1991 talon 500 hp project
Thinner oil gets thinner with more heat and can lead to spun rod bearings and other problems. It's very common to run 20w50 on cars that are road raced. Many high HP cars are meant to run 10w40 or 20w50. GT500s run 5w50 stock. Many manufacturers recommend running thicker oils like 10w40s, 20w50s on cars that see more severe duty. Like the oil cap on a Subie says 5w30, but in the manuals for some of them they recommend up to a 50 weight depending on how the car is treated. The weights recommend on the oil cap and such are usually meant for typical normal street driving, in normal climates, and not beating the crap out of the car. Thicker oil robs HP, but can save motors.
I would not put any merit into an article on a Ferrari forum based on a stock car.
Most cars I see don't have a real oil pressure gauge on them and I doubt the owners watch them 100% of the time.
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