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Oils but which is best
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Author:  ardy [ Wed Jul 23, 2008 8:27 pm ]
Post subject:  Oils but which is best
I know most of you get your boat serviced at reputable dealers, but even then, they will often use just average oil. Does anyone opt to use a higher quality oil ?? If so what oil / viscosity / brand etc ?? I have on order a H180 3.0 Mercruiser and was wondering is it worth the extra expense ?? All of my cars I try always to use a high quality oil because over the life of the car's engine, it works out only a couple of hundred dollars extra and I believe it pays for itself, does this line of thinking cross over to the boat engine??
Well what do you reckon??????????
Ardy
South Australia
Author:  ht32bsx115 [ Wed Jul 23, 2008 9:22 pm ]
Post subject:  Re: Oils but which is best
Howdy,

Here's Mercruisers suggestion.

http://www.mercurymarine.com/serviceand ... ueloil.php

In reality, you can use just about any oil. Just change it once a year or every 100 hrs or so....then change it right before "winter' layup.


Cheers,
Author:  pet575 [ Thu Jul 24, 2008 9:24 am ]
Post subject:  Re: Oils but which is best
I use the 25W40 Merc Synthetic Blend myself.
Author:  Rob [ Thu Jul 24, 2008 10:27 am ]
Post subject:  Re: Oils but which is best
+1 - Merc 25W40.
Author:  Paradise [ Thu Jul 24, 2008 1:11 pm ]
Post subject:  Re: Oils but which is best
Royal Purple Oil SAE30...I use Royal Purple oils in everything from my my truck to my deep fryer...I swear by the stuff

Since you change the oil probably once a season...I would defiently say put in the ebst you can
Author:  Aussie_Horizon_190 [ Sun Jul 27, 2008 10:19 pm ]
Post subject:  Re: Oils but which is best
Hi Ardy,

Just had mine serviced last week - they used the genuine Volvo synthetic stuff in both the engine and the leg.
Author:  chrisvs [ Mon Jul 28, 2008 12:20 pm ]
Post subject:  Re: Oils but which is best
I'm in the Volvo camp too, but I do the same as Aussie_Horizon_190, using Volvo (30W) synthetic. If I had a supplier of the Royal Purple stuff around and I were doing the changes myself, then I wouldn't hesitate to use it either. I would suggest letting your dealer do the changes with genuine Merc oil during warranty period, just to eliminate any chance for dispute if things should go wrong.

IMO, the extra protection of a full synthetic would be of benefit in a "constantly loaded" marine engine. Nothin' to back that up..... just gut feel :D
Author:  LouC [ Mon Jul 28, 2008 12:58 pm ]
Post subject:  Re: Oils but which is best
On anything that is under warrantee, be it Volvo or Merc I'd use whatever they specify. Yes the cost is more than aftermarket stuff but if there is ever a warrantee issue there is no question.
In my 20 year old Cobra 4.3 I use Chevron Delo 400 straight 30 W and the Merc High Perfomance gear lube (as recommended by my sterndrive mechanic) with good results. I would not use a conventional multi vis in a marine engine unless specifically recommended by the manufacturer.
Author:  mco804 [ Mon Jul 28, 2008 2:05 pm ]
Post subject:  Re: Oils but which is best
I use genuine Volvo synthetic
Author:  Txjole2 [ Tue Jul 29, 2008 8:11 am ]
Post subject:  Re: Oils but which is best
Amsoil
Author:  230 Mike [ Tue Jul 29, 2008 6:14 pm ]
Post subject:  Re: Oils but which is best
For your new boat, use exactly what the manufacturer recommends. Beyond that, I'm a big believer in synthetic lubricants. For most people it's a once-per-year expense, so the additional cost for synthetic oil shouldn't be viewed as a hardship IMO.
Author:  ardy [ Tue Jul 29, 2008 7:47 pm ]
Post subject:  Re: Oils but which is best
I intend to follow the servicing to the letter while it is under warranty and maybe if the service department is agreeable run the higher quality oil . Once out of warranty sounds like the synthetic oil is the go ,thanks for all your feedback any other suggestions is still welcome
Ardy
South Australia
4 months to go but who is counting
Author:  millhaven_nice_guy [ Wed Jul 30, 2008 12:08 pm ]
Post subject:  Re: Oils but which is best
After my Fiasco with my blown oil cooler, I have changed my oil 4 times now. I used 10 W30 cheap stuff for my flushing and short run times and have now changed out to Quicksilver 25W40. I had bought some 10W40 full synthetic that I was going to use but a couple of veteran boat guys I know talked me out of it. They said the 10 weight state would be too light for proper lubrication on a marine engine that is under load and heat for long periods of time. I thought it was a load of BS but decided to Err on the side of caution and use the 25W40. My theory is that a car pounding down the highway at 65 mph is running just as hot and under the same load as a boat motor and we use 5W30 in some of those. I probably should have just used the synthetic but was a bit gunshy since I was so close to having to maybe replace a $10,000 motor.
Author:  BrentC5Z [ Wed Jul 30, 2008 2:30 pm ]
Post subject:  Re: Oils but which is best
millhaven_nice_guy wrote:
My theory is that a car pounding down the highway at 65 mph is running just as hot and under the same load as a boat motor and we use 5W30 in some of those.


Most Autos are only turning around 2K RPM while cruising 65 mph.
Author:  firecadet613 [ Wed Jul 30, 2008 3:13 pm ]
Post subject:  Re: Oils but which is best
I use Rotella T full synthetic 5W40.
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