jharran

I have a 2001 Mercury 496 HO Mag. After I run the boat for a few hours and recheck the oil I find it to be down a half quart. Is this normal, as I have been told that big blocks burn oil? What is a good weight and type oil to use especially in Az temps? Jeff

ActiveFun

I can tell you the HP500 burn oil. I hear the factory says up to 1 qt in 5 hours of hard running.

GatorDave

I've got 170 hours on my HO and I don't think I've had to add oil at all. I would keep a close eye on it and see if it continues to use oil. I'd be interested to hear what other HO owners are experiencing.

Dave M

My '04 496HO doesn't use any oil. My old 454 Mag used a qt about every 10 hours.

mwdill

real hard running i have noticed that i burn about a half a quart, but thats real hard running for a long time :
does not do it when running normal.

Pantera1

I burn about a gallon of oil evry 5 hours

cbeastwood

One does, one doesn't. The one that does burns about a quart every 10 hours...

yesrej

i hav an02. ive put 30 hours this year and havent lost a drop. i got 230 total and never noticed anything different.

Rippem

ditto. pair of HO's never down at all between changes. nearing 200 hours.