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I think it is the newer one since it is a 2013 model generator with “multi point injection”.

Hello, I recently acquired a “Kohler 38RCL” natural gas powered 38kW standby generator that came with a home. It was installed in 2013 and maintained semi-annually by a prior owner through service vendors. The generator contains a 4.3L naturally aspirated GM Vortec V6 as best I can tell. It...

Uh oh, he’s using used oil analysis to compare the relative performance of different oils.

I didn't think this was worthy of it's own thread but I did an early change on the HPL Premium Plus PCMO 0W-30 after 500 miles so that the following 5000 mile interval has less of the old M1 AFE remaining. I also wanted to see how fast the engine is diluting fuel. After just 500 miles it was...

Here (on line 2) is the amdended oil analyzers VOA for the HPL premium plus PCMO 0W-30. I plan to deduct the 9 ppm aluminum in future UOA using this oil. They unflagged the Al and corrected the product information. Line 1 is the M1 AFE 0W-30 I was using before.

Speediagnostix said they re-ran their sample and the same result repeated; I didn’t get a second analysis report to go with that.

Interesting test, thanks for sharing. Looks like the wear metals were ~50% lower with the 30? Inconsequential and within the margin of error for the analyses? Maybe, but still entertaining to read about. Now do a dyno with each one to see if you gain a horsepower with the 5W-20 :)

Seems reasonable. I do 5000 mile changes since I drive 10-15k per year but if I didn't I'd probably do 6 month changes as well. The engines are moderate fuel diluters by most accounts (2-5%) despit dual DI and MPI. Low annual mileage often equates to short trips, which have a tendency to...

Added charts and graphs for easier to visualize comparisons

Actually Blackstone didn't know what the sample was when they ran it so you're seeing their blind result, the first report I got it was just labled "unkown" but when I told them what it was it didn't change anything. Oil Analyzers thought it was M1 AFE since that was what I sent them before...

https://bobistheoilguy.com/forums/threads/triple-lab-showdown-mobil-1-afe-0w-30-3-5k-mi-24-ford-bronco-2-7l-eb-14-5k-mi.392346/

I'm not sure they publish that but most of the other HPL analyses I've seen indicate something in the 800-1000 ppm range for Moly, granted that's for other grades and types of HPL. I'm sure @High Performance Lubricants could chime in if they want to but I would bear no grudge if they want to...

These are unused/virgin analyses of High Performance Lubricants Premium Plus Passenger Car Motor Oil 0W-30 purchased January 2025. Just for fun, I sent 3 labs (Blackstone, Oil Analyzers, SpeeDiagnostix) samples from the middle part of the same bottle of this unused oil. Oil Analyzers/Horizon...

I did send the 20 DEC sample to both OA and SD in addition to this recent 31 JAN sample. 20 DEC showed a similar disparity in fuel dilution % as 31 JAN. I did ask for SD for a rerun of this one from 31 JAN, awaiting a response.

Via email LSJ said gas that gas chromatography is what they use to detect and measure fuel dilution for the speediagnostix reports.

6 weeks about 75% highway about 25% city with a fair bit of idling to keep interior warm on cold days. 2 off roading trips (6-7 hours each) with a little bit of driving in 4 low and lower speeds/higher rpm & temps.

What I did find interesting in this video is that fuel dilution seems to increase to a certain threshold quite rapidly until it reaches a certain point of equilibrium, not gradually over an extended oil change interval as seems to be common knowledge? I don't think that a shorter oil change...

I found it interesting that they talk about WWII airplanes being one of the initial applications for synthetic oils. Legacy piston airplane engines are one of the few applications where we can't use synthetics today because, as I understand it, full synthetics don't sufficiently scavenge the...

I can't find anything that says directly if SpeeDiagnostix use gas chromatography. There are some porsche club forum posts and 3rd party websites (LN engineering) that claim that they do. If that's the case I don't know why their fuel dilution % is consistently 1/2 to 1/3 what OA shows...

Just for fun, all 3 taken from the same oil drain. Main differences seem to be fuel dilution (Speediagnostix showing ~1/2 Oil Analyzers and Blackstone "estimating" less than 1/5th OA); then big differences in Ca & Mg between the SpeeDiagnostix report and the other two. Switched this vehicle...