Oil change, Reccomendations?

Posted by monsterbronc on Jun 21, 2011; 3:29am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Oil-change-Reccomendations-tp3089103.html

Im coming up on my first oil change, right now Its got re-cycled 15-40 diesel engine oil in it (IT WAS FREE) and im having shift issues. lots of secondary neutrals.

What Oil should I use? the books say 10-30, and says nothing about special motorcycle oil. I have a couple of really (really really) high mileage old school engines in my daily drivers (bronco has 401K eagle has 210K) and I am  firm believer in synthetic oils. in the diesel trucking industry I SEE the difference. That bronco of mines been running castrol syntec since I bought it, and that was 250,000 miles ago, never had a head off it.

I'm wondering if synthetic oils will hurt my clutch, I would like to run either casrol Edge, or royal purple. and would I benefit from thicker oil in this older motor, or is that my shifting problem?

Thanks, Steve.