I have a 91 si and it 183,000 milse on it. The previous owner has always put Castrol 20w-50 in it I was told the best for it would be Vavoline 10w-30 extended life. But with 20w-50 I use about 1/2 to a full quart between oil changes. Would puting 10w-30 back in it hurt anything or cause it to use more oil?

thanks
Later
Matt

 

Shouldn't his be in the tech forum.. But yes, you will probably get more oil consumption if you switch, due to the more viscuss oil..

 

Generally, you want a really good reason to use heavier than factory recommended weight (which is 5W30 for most Hondas). Extreme heat qualifies as a good reason, but I doubt you get that kind of heat in Florida (maybe in the middle of summer).

It sounds like the previous owner was using heavy oil to mask a tired engine. Yes, the lighter oil will burn/leak faster, but will provide better protection.

I would try the lighter oil and see what happens. If it burns away quick, switch back to the heavy stuff and start saving for an engine rebuild.