Quote:
Originally Posted by freein05
I only use regular gas. The specifications call for regular. It does say in the trailer towing area that premium is recommended. I think the key word is recommended. I have not had any pinging using regular towing my TM. Maybe premium would provide a little more power.
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Conceptually, what might be happening is the engine may be tuned for premium gas. When using regular gas, pinging is detected and the timing is adjusted (retarded I think) to eliminate the pinging. This protects the engine with a loss of power.
Pinging normally happens most often under heavy load. Stomp on the gas pedal towing a trailer going up a hill.
As a compromise I would suggest use regular when not towing and use premium either when towing or at least when towing on hills.