A question about bearings.

[jm2]

actually I believe that it says "4/10 mpg improvement" or 'four tenths of one mile per gallon improvement', for a 3-axle tractor set, and

not 4 mpg; nor 0.4%; nor 4/10 of a percent....

[DKB_SATX]

Originally Posted by jm2

actually I believe that it says "4/10 mpg improvement" or 'four tenths of one mile per gallon improvement', for a 3-axle tractor set, and

not 4 mpg; nor 0.4%; nor 4/10 of a percent....

That would represent something like 6-7% for the average semi, I think. It seems like around 6 MPG is a good rating for them.

6% would be a big deal if it's provable, since it would go straight to profit once any price difference for the blue bearings is defrayed. I'd find 0.4% more believable in the absence of supporting data, but I'm the cynical type. To illustrate just how cynical, I'd also want to make sure they're comparing their product to a brand-new high-quality bearing without the coating, and not to the performance of a bearing that's ready to be replaced because it's worn out.

Where did you see this claim? I poked around on their site for a while and didn't find a specific claim.

[jm2]

upper right hand quarter of the home page at MICROBLUE® | Superior Friction Reducing Technology

and, my apology to MrBeast, as it was he, not that home page, who said "4 mpg".

best,

[DKB_SATX]

Ah, OK, I was looking for a titled section about that and ignored that section as "headlines" which it turns out was mostly right.

It links to a section in which they say: "We've now shipped over 500 bearing sets to customers throughout the US and Canada. On 3 axle tractors, nobody has given us any other number than 4/10ths. improvement. Sounds crazy, but it's true. We're starting to get trailer info in, but the picture hasn't been as consistent. The problem with that has been all about the install."

So, this improvement has all been reported by customers who bought the bearings, and since it's replacement bearings on commercial vehicles, I'd guess that most of the installations were replacing worn-out bearings. I can believe that new top-quality bearings replacing worn-out sets might achieve 6% improvements in that kind of application.

[SeeMore]

Each to his own theory of Murphy's visitation cycle. My Dad called me "Murphy" for the first five years of life despite my mother's protestations. Personally, I travel with 4 full sets of bearings, tools for the job, and lube- vestiges of my Boy Scout days.