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What would happen if someone used Dexron III in a transmission that required Mercon V? Would the driver notice any difference while driving? Would the transmission simply have a slightly reduced lifespan (20% or less reduction in lifespan), or would the transmission die within 20,000 miles...

Zaino offers the best shine of any product I've tried. I've also found it to be the most durable.

I really wanted to try this Duradrive MV ATF in my Mazda3's transmission a couple of years ago, but decided otherwise after emailing Petro Canada. They told me I shouldn't use it my Mazda3 because it did not meet the Mazda ATF M5 spec. It probably would have worked fine in my application, but I...

Originally Posted By: tenderloin Some dealers get tired of people using their resources to get part numbers and then order the parts from some place else. Unless manufacturers make part numbers freely available online, then dealers should be willing to spend their time assisting you in...

Originally Posted By: tig1 Any real proof that Mobil tech is wrong? http://www.fcsdchemicalsandlubricants.co...nsmission Fluid Note that the Ford spec number for FNR5 ATF is "Mazda M5".

Originally Posted By: ledslinger I found this and it suggests the FL22 is green, but is also compatable with current green coolant. Good to know. I want to switch my Mazda over from the regular green to the FL22 at my next coolant change, and I was worried about negative interactions between...

OK, well then that explains the large TBN difference. I respectfully take back my comment about M1 having its backside kicked.

Wow, look at the difference in the TBN's! Obviously the two runs were not identical (which months were each of the oils in use?). Unless one run was all summer driving and the other was all winter driving then I'd say the German Castrol kicked Mobil 1's butt!

Originally Posted By: StevieC ...Canadians seem to get screwed to the wall with everything so a savings like this just had to be posted. +1

When the oil is hot its viscosity will be lower than when it's cold, which in turn leads to thinner film of oil on the dipstick. The thinner the film on the dipstick the clearer it will look, all else being equal. Imagine trying to look at your hand through 4 inches of murky water versus trying...

Was the Quaker State make-up oil, or part of the initial fill?

Originally Posted By: Ven I have an '06 F-150 FX4 4x4. I flushed the trans at 30,000 miles with M1 Syn ATF. No problems for about the firt 1000 miles, then I started to notice a few things. FYI, Canadian Mobil 1 ATF is NOT Mercon V approved. It's stil only a Mercon/Dexron III ATF...

That's still wear, it's just chemical wear, not mechanical wear.

Originally Posted By: ekpolk No, UOA is NOT "worthless" in comparing oil performance. You simply have to confine your conclusions to the parameters within which the information provided is valid. You can validly compare wear metals, so long as you understand you're looking at particles (EDIT: or...

And I don't consider that a knock on GC, as I think it's an exceptional oil with few peers (in North America, at least). The fact that someone would believe it does not contain any VII's is credit to the quality and shear stability of the VII it does make use of.

I strongly doubt that GC and Esso XD-3 0W-30 are VII free given their extremely high viscosity indexes.

Mazda3 2.0 Mobil 1 5w30 OEM Mazda Filter

Higher journal speed is a good thing, it creates a stronger hydrodynamic wedge of oil in the bearing. The higher the journal speed the higher the load that can be supported without journal to bearing contact for a given oil viscosity. It's the high load + low rpm (ie low journal speed) + low...

Originally Posted By: jigen He was only concerned because he felt the 5w20 was only stated for fuel economy reasons and if a 30 weight would be better, he would have went that direction. While it is true that the 5w30 PP will protect the engine better during periods of hight temp high load...

Originally Posted By: addyguy I'm going to say it once again, and leave it at that. Stevie, you are probably right that the man. can't deny your warranty, and you have backing of the M-M act to cover you. But that doesn't mean they won't try. They'll fight you on it, pure amd simple. They may...