Originally Posted By: Trav
Originally Posted By: Marco620
Swill? Back in Wyoming I saw 85 octane lol
Talk about retarded timing and poor fuel economy to save a few pennies.
Common at high altitude.
Colorado, Wyoming, Utah, etc.
The engine doesn’t need to retard the timing because the effective compression ratio is reduced by the 20+% reduction in air density. Normally aspirated engines run just fine on 85 at altitude.