Shell says that there 93 reduces carbon buildup on valves. After reading two separate test reports by independent agencies, they confirmed the claim. And not all 93 that they tested prevented the carbon buildup. Shell says that there 93 is nitrogen enriched. I will ask my co workers in the knock...
I work at a Shell refinery. Yes the 87 octane gas is blended to the same standard. The 93 octane is not. So Shell does make gas for shell stations. Just not the low octane.
I usually shift to D then back to S to let it auto shift from 1st to 2nd. The paddle shifters are great for straights and mild turns. The auto shifting in S is good from 1st to 4th then sucks after that. Just learn to shift to D coming to a stop or hard turn then shift to S then give a chance to...