Post by
MinisterofDOOM »
https://forums.nicoclub.com/ministerofdoom-u16506.html
Mon Jun 18, 2007 10:05 pm
Generally, Chevron and Shell premium are right about equal as far as fuel quality, and pretty much the best you can get.
Of course, there are a LOT of factors beyond just the brand name that can impact quality of fuel, and many of those can differ from one gas station to the next--whether they're the same or different brands. Fuel from two different Shell stations might yield different results, for instance.
Upper-tier brands like Chevron and Shell tend to buy the cleanest, purest fuel, which is why they're generally more expensive. They also have the best detergents.
To actually answer your question, though:It might be worth your while to experiment and see if you can consistently get better milage per tank with Shell.