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Old 12-16-2009, 06:45 PM   #103 (permalink)
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Quote:
Originally Posted by smokeyj View Post
Ok now, how about a diesel? This has no inlet restriction. If you are going to see a benefit to any of this stuff, I would expect it would show in a diesel before a gas motor.
Over-oil your K&N on a diesel and you'll have a lot more problems than 10% more HP. They're not really recommended for use with diesels because the average end user doesn't realize that 1 oz of oil really is enough to coat the stupid thing.

Diesel's also aren't throttled by air, so even though there is intake restriction in a Diesel engine, it just limits max HP. As long as there is air in the cylinder for the fuel you're putting in, there is no problem, and once again, an air filter will not increase your economy, unless of course, you normally drive with a straight right leg.
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