I've never looked at a oil lab report. Thanks for the lesson. Good to know I am using the proper oil.

 

That's interesting. Everything I have read on it said it sheared to a 30 wt over time. I just bought a case of gallons and am gonna try it out. It is definately thicker than straight 30 @ the same temp when pouring it in an engine. I guess it's a mix of 25 wt & 40 wt, not a multigrade. Hmmmmm.

 

Mercruiser has also come out with a 25W40 synthetic blend, same as the other with 2 different weights, not mutli-visocity. After countless researches and talking to reputable engine guys, I'm told this IS the oil to use in stock-mild performance motors. Plus no warrentee issues with Mercruiser.

 

What about the possible antifreeze issue? Have you added any?

Address and cost of service?

 

http://www.blackstone-labs.com/index.html

 

Mercury Racing has the reports now, the engines are still under warranty. They'll be looking into the potassium issue, as well as a fuel dilution issue on the starboard engine.

Gilla, Blackstone charges 20 bucks for an analysis.

Jim

 

Why? Merc's Racing filter is one of the best. And for 20 hour oil changes, on a motor that never sees more than 210 degrees oil temp, what's the benefit? This oil has a better additive pack than most of the synthetics out there.

Jim

 

Mercruiser manual (496HO) does not recommend synthetic and I was told by Mercury that my warranty would be voided, although I believe that can be disputed. I'm warranted until 2008 so I decided not to take chances but regardless, based on what I've found in researches both the Mercruiser 25W40 conventional and synthetic blend are excellent oils. I change my oil every 20-25 hours which, for my motor, is probably most important thing when it comes to oil. I also use NAPA Gold (Wix) filters.

 

Yeah, I've seen some that "comprehensive data" on OSO... :laugher:

And very little substance. Check out bobistheoilguy.com.

Merc racing filters are made by Champion. Same as M1, but seems to flow a little better... About the same price, too.

 

Yeah, I've seen some that "comprehensive data" on OSO... :laugher:

And very little substance. Check out bobistheoilguy.com.

Merc racing filters are made by Champion. Same as M1, but seems to flow a little better... About the same price, too.

JimG-you sure-They look like Wix filters IMO.

 

Gilla, I've got some pics around here somewhere. I took some shots of both filters, (Merc Racing & M1-302) side by side and they are identical. Even the same baseplate piecemark (i). Either way, (WIX or Champion) the Merc Racing Filter (Black) is good stuff. And it's not overpriced, either. I pay 10 bucks for M1-302's. WIX is just about the same. I bought two MR filters for Bill's boat @ 11 bucks each.

 

FYI:
The new Merc 496's come with synthetic oil in them from Merc, and the manual states that Merc synthetic is required.

A freind (also a Merc tech) just boat a new Velocity w/ 496HO and that is what his manual said. He didn't know Merc had synthetic yet, but ordered some and he now has it.

Me - I use Amsoil 20 - 50. I do like how synthetics keep the inside of the motor clean w/o and sludge.

 

The one thing you have to watch for with synthetics is if you have roller rockers they tend to "not roll" with synthetics. That's why Merc has not allowed syn's on any of there motors that run roller rockers. Just what I was told, and I have confirmed with some custom builders as well.

 

FYI:
The new Merc 496's come with synthetic oil in them from Merc, and the manual states that Merc synthetic is required.

A freind (also a Merc tech) just boat a new Velocity w/ 496HO and that is what his manual said. He didn't know Merc had synthetic yet, but ordered some and he now has it.

Me - I use Amsoil 20 - 50. I do like how synthetics keep the inside of the motor clean w/o and sludge.

I don't think Mercury has a synthetic oil. Perhaps you're referring to their 25W40 synthetic blend?