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-   -   oil for 87 prostar (http://www.mastercraft.com/teamtalk/showthread.php?t=29124)

law32ps87 03-31-2009 06:17 PM

oil for 87 prostar
 
I have been using rotella t for the 2 years I have owned the boat, but I remember reading somewhere that they stopped putting in an additive that is needed for the flat tappet cam in my engine. Im not entirely sure if this is true, but what engine oil would be best for my engine? 351 indmar, non powerslot
thanks

Laurel_Lake_Skier 03-31-2009 08:09 PM

If you want to stick to a multi, Valvoline VR1 20W-50 seems to be the current best choice. It has the high level of ZDDP you need for the flat tappet engine. The Rotella still has the ZDDP in the straight 30 and 40 weights as well. For a very complete discussion, check out CorrectCraftFan.com and do a search for either the VR1, Rotella or ZDDP oil.....lots of tech talk over there.

east tx skier 04-01-2009 01:45 PM

I'm close to your latitude and run the 20W50 VR1. But given our temperatures in Texas, you'd probably be fine with the straight 40 as well.

TMCNo1 04-01-2009 02:09 PM

I've always run Valvoline VR1 40 weight in our '89,
Attachment 45674

loeweb 04-01-2009 02:45 PM

Quote:

Originally Posted by TMCNo1 (Post 585773)
I've always run Valvoline VR1 40 weight in our '89,
Attachment 45674

Stupid question but what is the difference between the straight 40wt and the 20w 50 VR1?

east tx skier 04-01-2009 03:24 PM

Quote:

Originally Posted by loeweb (Post 585788)
Stupid question but what is the difference between the straight 40wt and the 20w 50 VR1?

I'm not an oil expert, but the the multiweight oils are going to help you with lubrication at startup. Whether or not you can get away with using straight 40W oil is going to depend on how cold it gets when and where you're operating.

loeweb 04-01-2009 03:25 PM

Quote:

Originally Posted by east tx skier (Post 585807)
I'm not an oil expert, but the the multiweight oils are going to help you with lubrication at startup. Whether or not you can get away with using straight 40W oil is going to depend on how cold it gets when and where you're operating.

Thanks for the clarity. I better use the vr1 20w 50 here in the midwest.

law32ps87 04-01-2009 05:32 PM

thanks for all the replys. I went ahead an bought some vr1 20w50 at autozone.

wakesurfer 10-02-2009 06:27 PM

Oil for 1995 prostar 190 South Florida Boat
 
Quote:

Originally Posted by law32ps87 (Post 585865)
thanks for all the replys. I went ahead an bought some vr1 20w50 at autozone.

Please tell me what oil is the best to use in this boat with a chevy engine?
thanks for your time, and how many quarts do i need ? 6?

Thrall 10-03-2009 02:37 AM

Quote:

Originally Posted by wakesurfer (Post 637145)
Please tell me what oil is the best to use in this boat with a chevy engine?
thanks for your time, and how many quarts do i need ? 6?

5 qts (if you get it all out. I'm alwyas a little shy of 5 qts to get it full even after running the engine for a few seconds).
Any oil suitable for your car will work fine. I've run 10W40 before, but typically stick to 15w40 since I buy it by the case(s) for my diesel pickup anyway.
15W40 is reccomended by Indmar.
I use either Rotella or Delo as that's what's usually on sale.


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