TomS Altitude/AirDensity Will Play a Roll in the MsPG on that Drive ~ Although I Would Not Expect it to be that Big of a Hit ~ As He Looses Alt & the AirDensity Rises the ECU will Add More Gas' to keep the FuelMix' Stoichiometric ~ Additionally that Denser Air will cause More AeroDynamic Drag & so More Load on the Eng' which will require MoreFuel ~ Then there is the OctaneFactor ~ Denser Air @ Lower Alt's allows an Eng' to Make Higher Compression which allows Knock to occur Much More Easily & when the ECU then makes the AntiKnock adjustments MsPG GoDown ~ There is also some info that suggests that Gasolines in the MidWest may contain More Ethanol than out here in the West ~ ORR ~ DeanB
> > On Sat, Jul 30, 2016 at 12:03 PM, Tom Stone <tstone8359@aol.com> wrote: > >> My son is driving his '84 Vanagon with a newly installed 2.5 Subaru engine >> in it back from Colorado to Ohio. He has noticed a decrease in fuel >> mileage as he comes east. He says it runs great and accelerates normally >> but he is concerned about the mileage drop, from 22 to 16mpg so far. >> Sounds like a sensor problem but I know nothing about Subarus. Anyone have >> any suggestions? >> >> Tom >> |
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