Gas calories
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lessthanjakejohn
- Posts: 4105
- Joined: Fri Oct 25, 2002 6:39 am
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lessthanjakejohn
- Posts: 4105
- Joined: Fri Oct 25, 2002 6:39 am
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
The problem is what do you mean by standard gasoline?
Oxygenated gasoline [of which up to 10-15% may have been partiallly preburnt.......thus oxygenated]. At worst has 10% [EPA says 5% but refiners vary] fewer calories............thus it provides 5-10% less power for more money the American way.........as diet soda cost the same as sugared soda [soft drinks].
Energy Content (btu per gallon)Minimum Maximum DifferenceSummer 113,000 117,000 3.4%Winter 108,500 114,000 4.8%
The EPA study assumed that all base gasoline was 114,000 BTU yet RFG typically runs 111,000 BTU so non RFG [on average] could prove 5% more power at minimum especially in Summer.
The above are refinery numbers not service station numbers which can be up to 5% worse due to water in pipelines and storage tanks [affecting RFG gasolines more].
Oxygenated gasoline [of which up to 10-15% may have been partiallly preburnt.......thus oxygenated]. At worst has 10% [EPA says 5% but refiners vary] fewer calories............thus it provides 5-10% less power for more money the American way.........as diet soda cost the same as sugared soda [soft drinks].
Energy Content (btu per gallon)Minimum Maximum DifferenceSummer 113,000 117,000 3.4%Winter 108,500 114,000 4.8%
The EPA study assumed that all base gasoline was 114,000 BTU yet RFG typically runs 111,000 BTU so non RFG [on average] could prove 5% more power at minimum especially in Summer.
The above are refinery numbers not service station numbers which can be up to 5% worse due to water in pipelines and storage tanks [affecting RFG gasolines more].
