Kicking this thread, as I was trying to figure out the performance issue difference of Squirt between two different bikes. Made the decision to move away from an oil-based lube (Pro Gold) last summer, as I had gotten sick of dealing with the messy buildup. Fully cleaned the drivetrains of both my MTB and road bike. Used Squirt on the MTB, and Rock & Roll Gold on the road bike. Was thrilled with the performance on both bikes.
The MTB is used primarily as a gravel bike, and was shocked at how clean the drivetrain remained through all kinds of dusty conditions. The road bike seemed to pick up dirt a little more readily, so just before moving it indoors to the trainer in the winter, I washed and applied Squirt. Ran it through the winter, and then brought it into LBS to take care of front derailleur issue. When I picked it up, tech told me that the rear derailleur was not operating as it should, so he removed it and cleaned it thoroughly, as it appeared to have a gunky buildup. Hmmm. It was a mystery as to why the Squirt seemed to perform much better on one bike vs. the other, until I got into some of the nitty-gritty details at Zero Friction Cycling:
10, 11 and 12 speed chains have a VERY, VERY, VERY small single access point for lubes to penetrate through to the pin and then disseminate
across its length. The friction interface between the pin and the inside of the inner plate shoulders is a key high pressure friction and wear
point.
https://zerofrictioncycling.com.au/wp-c ... Squirt.pdf
The MTB has an 8-speed cassette, with visibly wider chain and gaps. Road bike has an 11-speed cassette. Could this be the key element in explaining the performance difference? I can't say with 100% certainty, but I've decided to go back to Rock & Roll Gold for the road bike, as I continue to use Squirt on the MTB.