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Stupid Question

Posted: Sun Mar 24, 2013 11:18 pm
by jddens
I know they say there's no such thing as a stupid question but I'm thinking the one I'm about to ask is.....:) I'm getting ready to change the oil in my motors, Merc 330hp gas 350's. Based on responses learned on the forum, I went and bought Rotella T 15-40wt. On closer examination I noticed it says "Heavy duty diesel engine oil". I can't imagine any reason why this oil shouldn't be fine......however, having spent close to $6500 on a new engine year before last I want to make sure.......thoughts???.....Thanks.....John

Re: Stupid Question

Posted: Mon Mar 25, 2013 5:26 am
by Allen Sr
I'm not sure on the newer engines but my older crusaders require the zinc in the oil and 15w40 still has it in it. That is what I use in my boat except its wolf head brand.These marine engines can use all the protection they can get IMO. If it was me I wouldn't hesitate to use it!

Re: Stupid Question

Posted: Mon Mar 25, 2013 5:39 am
by alexander38
+1

Re: Stupid Question

Posted: Mon Mar 25, 2013 5:57 am
by prowlersfish
The Rotella T 15-40wt will be fine . it also meets gasoline engine specs. I have used it for years on both gas and diesels boats I have owned. It is the oil of choice when I service someone else's boat or recommend a oil. 15w-40 is a great all season oil .

Re: Stupid Question

Posted: Mon Mar 25, 2013 6:42 pm
by jddens
Thanks for the feedback. I couldn't see any reason not to use it......it goes in tomorrow. Thanks again.....John

Re: Stupid Question

Posted: Tue Mar 26, 2013 3:56 pm
by Capt Marco
Arent the 330hp's a 454 model?

Re: Stupid Question

Posted: Tue Mar 26, 2013 4:45 pm
by prowlersfish
Capt Marco wrote:Arent the 330hp's a 454 model?

They can be 454s But in this case these are 330 hp 350cid engines they also made a 330hp 440 cid .