More data on chain lube and wear. If you read THIS post, you'll know Zio experimented with this cheap gear oil as an alternative to Mobil 1's synthetic version - one that's performed well over the decades.
This one performed very poorly. Used on a brand-new Shimano 11 speed chain, OEM supplied with Zio's Bianchi E-Impulso Allroad, chain wear exceeded .3 mm measured with KMC's digital checker after ONLY 2000 kilometers.
Compare this with Heather's identical bike and chain, lubed with mostly Finish Line green but the last 2000 kilometers with this same cheap gear oil, showing the same wear after 6000 kilometers, when both chains replaced, well before KMC's "smiley face" limit of .4 mm. Zio likes to replace 'em before they wear the cogsets to the point a new chain skips.
Repsol's cheap 75/90 w automotive gear oil is not very good as a bicycle chain lube, especially when compared to Mobil 1's synthetic version. Sure, it's 1/3 the price but far inferior when it comes to performance.
With the new chains come new chances for experimentation - maybe exclusively Finish Line green (a lube Friction Fiction refuses to test) on one with Mobil 1 synthetic on the other? Both bikes get used on the same rides at the same time so this would be a very direct comparison.
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