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Old 12-18-2019, 10:11 PM   #5 (permalink)
oil pan 4
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Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
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90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

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Probably a partial grill block for winter since you said the engine is not getting warm enough.
An air dam, how high or how low it goes is up to you.
GM claimed on their 2000s trucks that came with a factory tonneu cover increased fuel economy 6% on the highway.
Ford claimed that on their 2000s trucks that going from a 75mm chin spoiler or air dam to a 100mm air dam chin spoiler increased fuel economy by 1.5%.
When I put a 7 inch air dam on my suburban it was good for at least 1 full mpg no more than 1.5mpg.

Thereare also plug in heaters, block heaters and coolant warmers.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.

Last edited by oil pan 4; 12-19-2019 at 12:26 AM..
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