I would run out what you have in the tank first untill the low fuel light comes on, then get half a tank of 92 and add a bottle of either Seafoam or Techron to that gas, Run until near empty again and then just keep using 92 but not 92 from ARCO. One of the three I mentioned above.

 

On the subject of being frugal, not cheap, I do use the search tools on this website: http://www.seattlegasprices.com/GasPriceSearch.aspx?typ=adv&fuel=C&srch=0&station= Chevron&station=Shell&tme_limit=24

I'm usually out of town at least every two weeks, and around these parts gas is cheaper out of town. Often I go to Portland where top tier gas is .25 to .50 cents a gallon cheaper than it is in the Seattle city center area.

I make it a point to fill up in Portland and then top off at a Chevron station in Lakewood that still has Supreme at around 20 to 25 cents cheaper than in Seattle. I try not have to buy gas in Seattle if possible.

Gas is even cheaper in Redmond than Seattle and I go there for work occasionally and have found a Chevron on 148th and 50th that while not the cheapest is still cheaper and always good quality.

The added benefit of this is you're always riding on the top half of the tank which is good in case anything happens like this hurricane where gas stations run out and prices go up.

 

 

The problem with fuel for these is the definition of premium, North America and Europe use a different method. The handbook says 95 octane - BUT that is based on the European method, it works out to 91 North American, 89 would likely be fine 87 not so much.

Octane Conversions

Additives and detergents are a whole other thing as is the quality of the gas in delivered to the pumps, as anyone who has had a tank of contaminated fuel can tell you.

And in happy BC, we get hammered pretty good it is 1.289 a liter for 87 Octane (about $5.20 a gal US) 87/91 runs around 1.39 a liter or (5.60 a gal) and the 94 1.47 a liter (6.10 a gal) go into Vancouver proper you can 25 to 30 cents a liter more.

But most gas here is pretty good.

 

Your engine will adapt to whatever grade of gas you put in it... It's just that the adaption has a cost. This is actually a pretty smart design feature for the scenario that you might find yourself in Botswana and the only available gas comes in a 2 liter coke bottle and you have no idea what it is... The ECU will adapt and get you to a place where you can get proper fuel... At a cost of course which is less than optimum performance and economy.

 

I have found 91 seems to be the best choice, ate the cost of a 6 tanks of 94 and fuel mileage was not enough improved to warrant the cost.

 

I used to buy at Esso, but now I fuel up at either Petro-Can or Shell (this was more because of recent changes to the points programmes; in our trucks those points go a long way ). In the switch I didn't notice any difference in performance, but maybe that's just me

Altitude also factors in when thinking about which octane fuel you need in your Rover. Here in the mountains I run 91 octane, but if I were closer to sea level like out in Vancouver (or say, London, for that matter) I couldn't get away with it.

 

I uses Shell here in British Columbia. Their 91 Premium does not contain ethanol.

 

i wish i could ethanol free. the midwest is corn country, so ethanol free is hard to find.

 

When I bought my Disco it was on regular 87 and I recently switched to Shell 93. About 20 miles after filling up with premium the check engine light kicked on for random misfire. Could this be the computer readjusting to 93 octane? Thanks