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Thanks. Learned something today!
 

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@Texas_Stelvio I THOUGHT the additives were added at the stations now. All the marketing stuff says at the storage facility, but yeah..the same trucks go to multiple brands.


Your points about RVP are great too . I always try to go to the station that looks the best maintained from the outside, hoping it means they take care of the stuff you can't see too.


My family friends with the gas station always told us to fill up when it was cooler - morning/evenings - because the lower temps meant less gas was lost to vapor recovery at the filler. Ever heard of that...or is it an old wives tale?




BTW for people who don't know what RVP is, it stands for Reid Vapor Pressure and has to do with the fuel's ability to stay liquid and not vaporize in the fuel line (which can kill an engine) and it has to be lower in the summer and higher in the winter. The changes in formulation (in the winter butane is added I think) affect the combustibility - less in the summer - and octane ratings. The problem T_S is talking about would be driving around with the wrong RVP grade gasoline COULD cause an issue where your fuel vaporized in the line which would kill the engine and cause all kinds of problems if you were on the freeway doing 75... It doesn't happen often and really that is an extreme example, most often the engine just runs rough and you get bad gas mileage - maybe cause a little extra internal wear too. Please correct me if I don't understand it right though!
 

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Stick with Top Tier Gas. Here's consumer reports take on a good AAA study:

https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/

"Bottom line: For the nominal investment, this study shows that motorists would benefit from using Top Tier gasoline as their primary fuel.

Given the technological trend toward more sophisticated engines, we think the EPA should consider raising the minimum detergent standards to ensure all drivers benefit from the type of performance and longevity promised by Top Tier fuels. "

Also - the AAA phone app will point you to top tier gas stations near you (don't need to be a member).
 

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From that article - seems like a list that could be on anyone's drive... and if the pictures of the valves are for real from the study, well, easy to see that the detergents do something good (notably missing for east coast, Sheetz and Wa-Wa - they are not listed as participating in the Top Tier program, unless they are under some different branding, which would be strange...):
 

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Yes it's kind of a bummer on WaWa. My dealer is maybe 500 feet from a WaWa. I asked if they gassed the cars up there he said "No no no - that's for coffee".
 

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Sunoco??
 

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Yes it's kind of a bummer on WaWa. My dealer is maybe 500 feet from a WaWa. I asked if they gassed the cars up there he said "No no no - that's for coffee".
If it makes you guys feel any better, we trade daily with Wawa and Sunoco. Both are typically pulling gasoline bbls for the same exact terminals the other 'top tier' gas stations are.

99% of the time it all comes down to the station and it's owners. If the station looks well taken care of/trusting owners/ and they have descent volume going through the station you have nothing to worry about.
 

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Yes it's kind of a bummer on WaWa. My dealer is maybe 500 feet from a WaWa. I asked if they gassed the cars up there he said "No no no - that's for coffee".
If it makes you guys feel any better, we trade daily with Wawa and Sunoco. Both are typically pulling gasoline bbls for the same exact terminals the other 'top tier' gas stations are.

99% of the time it all comes down to the station and it's owners. If the station looks well taken care of/trusting owners/ and they have descent volume going through the station you have nothing to worry about.
Nah, doesn't make me feel better at all. WaWa would have "Top Tier" on their pumps if they have a crap.
 

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Variety...

I've been driving since 1970, and had every kind of gas there is over the years (figuratively, not literally), and driven Fords, Chevy's, Dodges (383), Honda's, Toyotas, Mazdas, Volvos, Renaults, Jaguars, BMW's, BSA's, Yamahas, Moto Guzzi's, Harley's, and a few others, and 4 ALFA's: In all these years and all those vehicles, I never had an issue with fuel, and always used the appropriate octane. The only thing you do not want, is fuel sitting in a vehicle for long periods of time unused.

Other than that, I can say that I rarely go to the same gas station twice in a row, no matter what brand, so if there was a less than stellar formula underground that got into my tank, it would never be replaced with a second tank of that bad gas.

Like @Texas_Stelvio says, as long as you are getting your gas from a reputable company/station, it's all good, and if it is top tier, all the better, but I expect even if WaWa is not top tier, it probably has similar detergents, if not the same as Top Tier in most of it's fuel. They pump a lot of fuel...
 

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I don't understand people who buy an expensive performance car and worry about the cost of fuel. Find a car that takes low grade fuel, drive it and if you like it buy that car.
 

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I’ve read about these engines and it seems that these 4-cyl turbo’d engines are prone to pre-ignition. Because of this, they are prescribed a special oil to help with that. I would think if you’re putting lower octane in your car, it would only make the condition more favorable for pre-ignition. Lower octane gas combusts easier than the higher octane gasoline. This is why your race gas has 98 - 110 octane. I always, always, always put 93 octane in with no ethanol. The last thing I want to do is put my Stelvio at risk for pre-ignition and engine problems.

I’d like to try race gas, but at $9.75/gallon it’s a bit prohibitive ?. It WOULD smell nice though!
 

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I’ve used 110, one time at a 1/2 mile timed event and the difference was noticeable but not remarkable. I’d stick with 93 if available.
 

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Nah...pre-ignition is beyond easy for the computer to kill. Part of why response off the line isn't as good though.

Only speaking for myself....it's being cheap.

Very rarely (less then 10 times total) I have put regular gas in the car. Generally because I figured wrong and have to add a few gallons to get home....and just can't stomach paying .30 or more per gallon even at regular.

I'm lucky to be in an area with the cheapest gas in Ca pretty much + I'm cheap + kinda hate giving money to gas companies, taxes, businesses in LA that aren't selling me food...etc....so sometimes I put in $5-10 in cheap gas to get home, then I fill up with good stuff.
 

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280 HK and MPG

Hi
Have a new Stelvio 280 HK and have about 1170 miles om the meter.
Have driven the car the most in the city but 16 MPG is a bit too much according to me.
In total, with a little highway, it is currently at 18.4 MPG.
What consumption do you have?
I only use Shwll V-Power 98 octan
 

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I only use 93 octane Tier 1 gas. I if worried about the price of gas I would have purchased a cheap low performance car. Happy with the gas milage better than my Honda Pilot that I traded and while I pay more for gas I go farther on my dollar. Get 22 to 28 MPG with average of 24
 

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Same as Pete. Around 23-24 mpg in mix of city suburban driving. One of my favorite cars was the last Volvo XC90 with the Ford modified marine V8 engine. Best mpg I ever got was 19 mpg.
 
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