91 octane gas only? - Page 3 - Alfa Romeo Stelvio Forum
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post #21 of 38 (permalink) Old 03-04-2019, 08:23 PM
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Thanks. Learned something today!

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post #22 of 38 (permalink) Old 03-04-2019, 08:34 PM
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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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post #23 of 38 (permalink) Old 03-05-2019, 11:10 AM
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Stick with Top Tier Gas. Here's consumer reports take on a good AAA study:

https://www.consumerreports.org/car-...h-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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post #24 of 38 (permalink) Old 03-05-2019, 12:20 PM
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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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post #25 of 38 (permalink) Old 03-05-2019, 03:04 PM
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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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post #26 of 38 (permalink) Old 03-05-2019, 07:43 PM
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Sunoco??

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post #27 of 38 (permalink) Old 03-05-2019, 10:35 PM
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now!
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post #28 of 38 (permalink) Old 03-06-2019, 10:18 AM
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Quote:
Originally Posted by Funkytoad View Post
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".
Quote:
Originally Posted by ViscontiVerde 164L* View Post
Sunoco??
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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post #29 of 38 (permalink) Old 03-06-2019, 08:12 PM
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Quote:
Originally Posted by Texas_Stelvio View Post
Quote:
Originally Posted by Funkytoad View Post
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".
Quote:
Originally Posted by ViscontiVerde 164L* View Post
Sunoco??
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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post #30 of 38 (permalink) Old 03-07-2019, 08:59 AM
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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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