View Full Version : Change Motor Oil When you Winterize?

10-17-2009, 12:31 PM
Is it a Good Ideal to change your engine oil when you winterize or change it next spring when you unwinterize. Will it hurt it to leave the dirty oil in and have fresh oil next spring ?

10-17-2009, 12:38 PM
I have always changed mine when I winterize.
I was told to get the old oil out with all the contaminets so its not in there all winter.

10-17-2009, 01:18 PM
Used motor oil is acidic and contaminated from blow bye, fuel and combustion gases

10-17-2009, 01:27 PM
I always change my oil before I winterize, and drain it while it's hot to get as many contaminants out of there. I can't imagine draining cold oil in the spring, or worse yet starting the engine with dirty oil that has 50 hours on it after it sat all winter.

10-17-2009, 02:14 PM
What they said....

Seriously, I change before winterizing because the oil is dirty.

In general, I store all my outdoor stuff ready to go for the next season.

88 PS190
10-17-2009, 02:49 PM
Change oil in fall definitely.

I'm not perfect, sometimes I end up running the boat a few times after I change it, like if the weather holds into the fall.

Double D
10-17-2009, 08:14 PM
Agreed to all of the above. Just winterized today and changed the oil and tranny fluid.

10-18-2009, 07:21 AM
What type of oil do yous' guys use?

10-18-2009, 07:54 AM
What type of oil do yous' guys use?

Pennzoil Marine 15W40 or Shell Rotella 15W40

10-18-2009, 08:27 AM
But don't waste too much time looking for Pennzoil Marine 15W40. Pennzoil Long Life Heavy Duty is the same oil and likely will be easier to find (I think they sell it at WalMart). You can also use Pennzoil Long Life Gold Heavy Duty. Another good oil is Chevron Delo 15W40. I've been using Rotella T, mainly because it's usually on sale at Fleet Farm this time of year.

You can google "15W40 motor oil" and look at the various brands. Virtually all of them will meet the Indmar-specified API requirements for your engine (CJ-4/SL), but the Pennzoil Diesel, Rotella T, and Delo are the most ubiquitous brands. I think NAPA sells the Rotella T.

10-19-2009, 01:27 AM
Anybody find the Rotella T in quart size bottles? All the places I find it at sell gallons, and partially-filled gallon jugs of oil are a bit of a pain to store in the boat just in case I find myself a quart low out on the water.


I know that with modern oils, mixing/matching different brands probably isn't an issue, but it makes me feel better to keep one product in the crankcase at a time.

Miss Rita
10-19-2009, 08:48 AM
WalMart has it, less than $3/qt.

10-19-2009, 10:53 AM
I use the Rotella because it is readily available at my local auto parts store. However, the Penzoil is available at most West Marine stores. However, buying oil at West Marine is a bit.....expensive.

10-19-2009, 11:18 AM
My local Ace hardware was able to order in some Pennzoil Marine oil.

10-29-2009, 06:22 PM
Bear in mind that all motors don't use 15w40 though. Definitely check the engine manual for that, but as far as using an alternate brand that meets the spec, I get that.

10-29-2009, 07:09 PM
Don't know about the PCM's, but for all the Indmars going back to the beginning, the oil that Indmar currently recommends is the 15W40 we're talking about, regardless of what the owner's manual used to say.