Quote:
Originally Posted by Lynn Eades
Heres a thing. The (minimum) octane rating on a 16 April, 1942 Jeep stated "68" Maybe the "80" refers to specific gravity of POL products for the weight calculation? Oil and petrol being approx. .8 sg?. Just a thought....
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I think Octane remains more likely. If 70 octane rating was "regular", with lower numbers being still available it would be reasonable if the Jeep required a minimum of 68 to specify the minimum to avoid someone using lower values. Surely the point of marking the tin is to ensure the correct product ends up in the correct vehicle but I've never heard of specific gravity of fuel or oil varying much (except with temperature - jet aircraft plan their required fuel load for a flight by weight since the energy content varies more accurately by weight than volume, then convert to volume, depending on temperature, for ease of measuring when pumping into the aircraft).