I am listening to a car repair talk show right now and I'll pass on what I just heard. For dirty injectors the host said get a bottle of BG44K and fill up with Shell93 octane. If you can't find BG he said get a 20 oz. can of Techron. He said th Shell 93 has a good cleaner in it. Frankly, I did not know one gasoline was better than another.