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IS there a difference in gas?
When i had my VW i didnt really have a huge concern about what kind of gas i was using. I usually used 87 at Arco (the cheap place). I know i need to use premium on my E90 BUT does it matter if i buy the gas from Arco? Shell? 76? I heard to use 76, i guess they have premium performance gas. But out here in San Diego, its about $3.03 .. My cousin has a IS 300 and he told me to never buy premium from arco. Cause its supposed to be "bad gas" ...?  Also, i know a guy who leases his bmw's and he said he never uses 91, he always uses the middle grade 89... Is this bad as well? | | Reply » IS there a difference in gas? |
This thread was fairly recent:
http://www.bimmerfest.com/forums/sho...ghlight=octane
| | Reply » IS there a difference in gas? |
Quote: This thread was fairly recent:
http://www.bimmerfest.com/forums/sho...ghlight=octane | I posted the same question concerning gasoline brands (not octane) on that thread, and it went unanswered.
| | Reply » IS there a difference in gas? |
Assuming that we are discussing fuel with an AKI (octane rating) at or near to the BMW recommendation, ie 89 or 91, and within North America, there is little difference between brands. Any of the name brands are reasonable, but that is not to say that they are identical. The base fuel is identical, the additive packages are different. There are federally-mandated levels of gasoline additives, to help modern engines meet the long-term emissions laws, but there are a wide range of opinions on the subtle differences between those additives.
Here is some reading:
http://www.toptiergas.com/
This has a strong flavour of marketing, but there is some basis to it. Note that a brand can not be listed as Top Tier only because they don't use sufficient additives in the regular 87, while their 89/91 would pass.
I like this page, based on the listed credentials of the author:
http://vettenet.org/octane.html
Personally, I use Chevron, Shell, PetroCanada, and Esso, almost exclusively 89 pump octane. I don't use the regional brands. I never fill up when fuel is being delivered to the station. I buy on price (there is always a gas war on), within the above range of suppliers.
| | Reply » IS there a difference in gas? |
I'm upset not to see BP/Amoco on the top tier list. I have been using that for as long as I've owned cars.
So far my E90 had 2 fillups, both BP.
I am considering switching to SHELL since that is the only "Top Tier" in my area.
Or am I being insane?
| | Reply » IS there a difference in gas? |
Quote: | Assuming that we are discussing fuel with an AKI (octane rating) at or near to the BMW recommendation, ie 89 or 91, and within North America, there is little difference between brands. Any of the name brands are reasonable, but that is not to say that they are identical. The base fuel is identical, the additive packages are different... | The base fuel is identical is almost an understatement. The fuel is pumped all throughout the US in the *same pipeline* even. It's then taken out by one of the companies, the additive package is mixed in, and then trucked to the gas station.
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IS there a difference in gas?