Hey guys. If anyone reading actually still has this issue, I think I've figured out the cause of the rapid oil thinning in the Honda engine on the older El Diablo models.
Long story short, it looks like the steel exhaust manifolds are the culprit. They can't be insulated because they aren't stainless. The crankshaft spins just below them, blowing extremely hot air straight at the air intake of the engine. The result is a very, very hot Honda.
The answer: customer stainless manifolds to replace the old ones, then insulate them.
Ran a box fan pointed at this area today, and it seemed to nearly eliminate the oil issue.
I'm going to test my theory by temporarily insulating the manifolds on there already. If it helps, I'm replacing them with stainless and insulating those.
I'll update at some point. Just thought I'd share.
Long story short, it looks like the steel exhaust manifolds are the culprit. They can't be insulated because they aren't stainless. The crankshaft spins just below them, blowing extremely hot air straight at the air intake of the engine. The result is a very, very hot Honda.
The answer: customer stainless manifolds to replace the old ones, then insulate them.
Ran a box fan pointed at this area today, and it seemed to nearly eliminate the oil issue.
I'm going to test my theory by temporarily insulating the manifolds on there already. If it helps, I'm replacing them with stainless and insulating those.
I'll update at some point. Just thought I'd share.