here's my situation. Pulled the boat out of the water late November and winterized the engine while on land. I ran the motor for at least an hour and got it nice and hot then drained the oil. Replaced the filter and refilled with 4 or 5 qts of pepb boys proline 10w30 oil, and 2 or 3 quarts of pep boys proline 20w50. Ran the motor for about 30 minutes to an hour more to circulate the oil, then shut it down for the winter.
my question is this, will mixing weights like that cause the oil to not last as long? And I mean only in the sense that it's going to sit in the oil pan for about 6 months until spring time. The motor isn't running on it. What I do is use cheapo dino oil to winterize the motor for the winter. When the boat goes in the water come spring, I run on the winterizing dino oil for a few hours, then change it and refill with a quality oil (been using various synthetics last couple years) to go the rest of the season. Should I be concerned about running this oil for the few hours next year? From what I've gathered it's ok to mix oil weights as long as it's understood that you mix using the same brand (which I did) and also understand that the oil may not last as long as compared to using all 10w-30 or all 20w50 because their chemistries and additive packages may clash. Do you think, given what I've done, that the oil will be 100% come spring, or will it also break down more over the winter because different weights were mixed?
btw, I thought I had all the oil I needed but I didn't and wasn't about to run 10+ miles for proline oil. And the 20w50 has been sitting on the shelf for the last year so I was more than delighted to use it up
oh, and I know I'm talking about a boat here but it's really just a mixing oil weight question and I figured I'd get the most responses here. Thanks.
[ December 10, 2002, 01:23 PM: Message edited by: 1 FMF ]
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