93 Octane….. small detail ! ! ! – page 2 – camaro6 physical science electricity review worksheet

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"Putting high-octane fuel in a lower-compression engine will have no effect other than separating you from your money. It won’t make your car run any better or worse, so if you give your non-premium requiring car premium fuel as a sort of treat, you’re just giving it a big fat placebo."

Using higher octane gas in -ANY- modern engine will allow the ECM to adjust to the more favorable timing advance to produce higher output, at lower RPM. In that link, they are only thinking of the CONVERSE—poorer gas gives slightly less power/economy.

The last truck I had was a 4.3 Silverado, with a ridiculous 6 speed auto. Premium it would often pull up moderate hills I was familiar with, at 1k~ RPM, and hardly ever downshift–as it was supposed to do under light demand. But use a lower octane grade, the damn thing would drop 3 (-THREE!-) gears, race a bit, not accelerate at all, and shift back to high—and then repeat. It was infuriating. Otherwise, it was a good truck.

Yes, I took that truck back to the dealer about half a dozen times- under warranty and they wouldn’t touch it. i believe the TCM needed a re-program, but that would have voided the warranty if anything happened to the drivetrain, or so they claimed. lesson, stay away from that 6-speed!!!!

"Putting high-octane fuel in a lower-compression engine will have no effect other than separating you from your money. It won’t make your car run any better or worse, so if you give your non-premium requiring car premium fuel as a sort of treat, you’re just giving it a big fat placebo."

Using higher octane gas in -ANY- modern engine will allow the ECM to adjust to the more favorable timing advance to produce higher output, at lower RPM. In that link, they are only thinking of the CONVERSE—poorer gas gives slightly less power/economy.

The last truck I had was a 4.3 Silverado, with a ridiculous 6 speed auto. Premium it would often pull up moderate hills I was familiar with, at 1k~ RPM, and hardly ever downshift–as it was supposed to do under light demand. But use a lower octane grade, the damn thing would drop 3 (-THREE!-) gears, race a bit, not accelerate at all, and shift back to high—and then repeat. It was infuriating. Otherwise, it was a good truck.

Yes, I took that truck back to the dealer about half a dozen times- under warranty and they wouldn’t touch it. i believe the TCM needed a re-program, but that would have voided the warranty if anything happened to the drivetrain, or so they claimed. lesson, stay away from that 6-speed!!!!

"Putting high-octane fuel in a lower-compression engine will have no effect other than separating you from your money. It won’t make your car run any better or worse, so if you give your non-premium requiring car premium fuel as a sort of treat, you’re just giving it a big fat placebo."

Using higher octane gas in -ANY- modern engine will allow the ECM to adjust to the more favorable timing advance to produce higher output, at lower RPM. In that link, they are only thinking of the CONVERSE—poorer gas gives slightly less power/economy.

The last truck I had was a 4.3 Silverado, with a ridiculous 6 speed auto. Premium it would often pull up moderate hills I was familiar with, at 1k~ RPM, and hardly ever downshift–as it was supposed to do under light demand. But use a lower octane grade, the damn thing would drop 3 (-THREE!-) gears, race a bit, not accelerate at all, and shift back to high—and then repeat. It was infuriating. Otherwise, it was a good truck.

Yes, I took that truck back to the dealer about half a dozen times- under warranty and they wouldn’t touch it. i believe the TCM needed a re-program, but that would have voided the warranty if anything happened to the drivetrain, or so they claimed. lesson, stay away from that 6-speed!!!!