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09-30-2021, 08:25 AM | #1 |
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Mixing Stern Drive Lube viscosities ?
Just drained and refilled my Merc 4.3L sterndrive.
I bought 1 qt of Mercury SAE-90, but it was not enough. I can see this in the engine reservoir container, that it is about 4-6 oz, below the full line. SAE90 is not cheap at $16 a quart. Question..... I have some 85W x 90 drive oil I used last year for a Outboard, can I add this to the current straight SAE-90, without causing any issues ? I'd buy another quart of SAE90 to add, but I'll be selling the boat in the Spring. Thoughts? |
09-30-2021, 08:27 AM | #2 |
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'The wrong oil is better than no oil'
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09-30-2021, 10:27 AM | #3 |
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Walmart.com says the Gilford Walmart has quarts of Quiksilver high performance sae-90 gear lube for $9.97/qt ..... and probably has Super Tech 80w-90sae marine gear lube for $6.28 .... and the out-drive will never know the difference!
5-stars, 10/20/2019: "Good price and I like the color of the oil (SuperTech). Easy to see if you have any water in your oil." ..... BigDaddy
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... down and out, liv'n that Walmart side of the lake! |
09-30-2021, 10:50 AM | #4 |
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I dont mix different weights. I dont even like mixing same weights of different brands. Buy the other quart at $16 and save the remainder for next year..............
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The Following User Says Thank You to SAB1 For This Useful Post: | ||
DotRat (09-30-2021) |
09-30-2021, 04:18 PM | #6 |
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Just to repeat... 'I'll be selling the boat in the Spring'.
Only need about 6oz to fill reservoir to full level. Thanks ! Last edited by bigdog; 09-30-2021 at 04:18 PM. Reason: spell |
09-30-2021, 06:54 PM | #8 |
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Mixing Stern Drive Lube viscosities ?
What would you do if you were keeping the boat? Do the same for the next guy. Its $16, Jeez… I put a set of tires on a car once for my buyer. $16? Do you squeak when you walk? BTW, thank you for the referral, Kevin! Sent from my iPhone using Tapatalk |
09-30-2021, 07:28 PM | #9 |
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$16 is the price of a 4 pack of micro brewed beer. Why screw the next guy. I’d be embarrassed to say that.
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09-30-2021, 04:40 PM | #10 |
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It's $16 to do it right. Add it to the price when you sell it.
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