it was crazy, I couldn't believe it. we filled up right before we left and the tank was almost empty it was all the same fuel.
Anyone experienced more MPG by running Exxon Synergy gas?
- Thread starter grammatoncleric
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Around here, EXxon (I call it ESSO) runs best in my Ford. Then Irving number two. I've gotten cat killing swamp water repeatably from other stations like Shell - even a big, busy Mobil near the interstate.
I am ay 27.1 mpg long term average** on Esso and QSFS 10W30, where previously I was at 23.3 MPG (L.T.A.) with Irving and 5W20 Castrol Edge.
**My L.T.A is over a 6 month/2250 mile period
- Ken
I am ay 27.1 mpg long term average** on Esso and QSFS 10W30, where previously I was at 23.3 MPG (L.T.A.) with Irving and 5W20 Castrol Edge.
**My L.T.A is over a 6 month/2250 mile period
- Ken
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Top Tier has nothing to do with MPG and everything to do with the quantity (not quality) of detergents.
There is nothing preventing anyone from using Top Tier quantities (or greater) without paying Top Tier tithe. The whole point of TT is for the little guys to claim their gasoline is as good as Shell, Texaco/Chevron, Exxon, etc.
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All gasoline at the distribution center is the same. The additive packages are added per lic per truck right during the fillup.
Costco does it differently. They get a pure non additive gas from the distribution center. Then the additives are added by the Costco attendant right at the pump when the fuel is delivered. In the end shell, Mobil and Exxon gets the same gas as Costco does. The difference is in additives and when they are added.
4WD
$50 site donor 2025
That rivals the little tornado intake gizmos
Where do costco store the additive containers? Is it in a UST and added by pump? Seems not safe to be bopping out with a carboy and a hand crank transfer pump and poor maths capabilities - otherwize.
I suspect that most MPG difference is lost in the variability of driving conditions, routes and the person driving. Now if you could layout a real experiment (25+ full tanks of fuel), then maybe one could find a small difference. JMO. Ed
I would agree, brand to brand, same octane the difference would almost be lost in the noise.
Unless some "super detergent" would better keep the engine top tune.
I have been relying on high-humidity weather to keep my Ford from pulling timing and over fueling its high comp12.5:1 engine.
Depends on the car and in particular with a turbo the fuel map/trim ie the knock detection enrichment scheme/amount. Yes absolutely better fuel, higher AKI will get better MPG because less cooling enrichment dumps (which also can cause fuel dilution)
But yeah the average, medium compression NA car, there will not be a detectable difference as it's buried in the variables.
But yeah the average, medium compression NA car, there will not be a detectable difference as it's buried in the variables.
The drop in mpgs is most likely related to one of the many other variables at play. I have been using Costco gas for years...it's the cheapest Top Tier 93 around, the additives are blended right at the pump. If it's good enough to track my car with it's good enough for cruising around town.
Even so you'll never make up the cost difference between premium/regular with a slightly bump in mpgs, it's at times almost a $1.00 more a gallon. Best is Costco where the variance is about $0.30 and *maybe* you'd make up that difference.
I do love me some Sheetz E85....ummmmm....corn......
It's not only crazy but impossible.
I said zero about cost.
Turbo = pay the piper one end or the other.
We suck it up no problem with a car that gets 35+ mpg hauling decent loads to and fro
This deserves to be repeated. The only differences ALLOWED by federal regulation are in the additives. There may also be a difference in impurities (rarely). The EPA mandates gasoline composition for a given region at a given time.
I commonly see the same trucks delivering gas at Costco, Arco, Shell, etc. stations.
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