Mercury's oil is 25-40 and doesn't have viscosity improving additives... so
I'm told. $25 of oil is a lot cheaper than a $4000+ engine replacement.
That's my 3 cents!


"Big gus" wrote in message
...
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m