Originally posted by mrhonda_187
5000 miles!! I'd say no way in h3ll. I can't even make it to 5000 km. By then it's usually black as sh!t and down 1/2 quart. I change every 4000 km (about 2500 mi).
But, like everyone else has said, it depends on your driving style... Watch the colour and level.
then you should have your engine checked. my old gs-r had 115k and i was running royal purple. i would wait 5000-5500 between changes and when i t came out it just wasnt purple anymore, not filthy nasty and diluted.
i've seen several cars who ran amsoil only, their engines were in amazing shape. this is what they ran:
http://www.amsoil.com/products/amo.html