I've had experience in the past once of going to an independent small petrol station and right after fuelling experienced engine pinging as I drove of.
So since then I only fill up from reputable petrol stations.
For me, it's just not worth it saving a few cents or a dollar. But that's just me.
You spend more to get a CT200H so it deserves the best.
I use a Mobil that is right down the street. Across the street is an Arco which is usually cheaper by 5 to 10 cent. I just refuse to stand in these triple long line at all the stations there at Arco. At about 10 cents a gallon I am paying a dollar extra, Take My Money. I don't do long lines for 10 cents a gallon savings.
I've been using cheap gas from Costco or Superstore (grocery store in Canada) since I bought our CT a year ago. About a month ago I started having a "rotten egg" smell coming from my car on quite a regular basis for about a month straight. After googling the problem, cheap gas can give off a sulfur smell. I've switched to Shell V Power for my past 4 tanks of gas... and I haven't had the smell since. Maybe it'll come back... maybe this isn't the fix... but it seems to be doing the trick so far.
I was a huge Chevron fan boy until one day I gave costco a try. Long story short, no negative impact to mpgs, no diff in performance, no odors/smells. Using mmo additive (marvel mystery oil) I was able to achieve an extra 1-2 mpg according to my fuelly.com data
Every 10 gals of gas, i add 4 oz of mmo (less than $0.25). I find it more cost effective compared to the nearest chevron/techcron (or any "top tier fuel" station within a 5 mile radius) where the price gap is a good $0.20/gal more for the name brand stuff
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Did you use their regular, mid-grade or premium V Power? I've been using the premium V Power (15 cents more per litre here in Saskatoon, Sk. Canada compared to regular) during my fill ups. Here in Canada regular and mid-grade can have up to 10% ethanol whereas premium has none. I'll keep my nose on things for now.... no warning light has come on... but man does that sulphur smell stink. I'm just wondering how many people have this issue. Does the CT have trouble burning off the sulphur in the additives?
Anecdotal evidence suggests that using petrol blended with ethanol does not really provide any financial advantage because the vehicle consumes more thereby negating any advantage over petrol with no ethanol at all. The jury is still out on this but I personally do not fill up any of my cars with ethanol-blended fuel. And I only go to reputable petrol stations.