dunno. peace of mind having a better quality product?
even though my car isnt special and my engine (b18b2 (non-vtec)) has a few problems here and there like headgasket leak, sump gasket leak and a few more things, i still like to use the best quality products i can use. they are all disposable products like tyres and petrol so i dont mind spending the extra money on better quality products. like using 98ron over 91ron even though im lucky to get 400-450 out of a tank (i fill up when im down to about 1/4 left) or having a large amount of camber and wearing tyres out within 20,000kms, id still rather fork out for the better quality product.

