does it really matter what grade of gas you put in your car? I was told never use costco gas.?

Answer 1

The Grade of gas can be important, if your car requires a high octane rating to run without knocking.

However, I think you are talking about the BRAND of gasoline.


The gasoline brands today mean nothing, the trucks go to the same depot to fill, and deliver to all the different stations.
If you get gas from the Shell station, it is the same fuel that you buy from BP. Costco, or any other station. It comes from the same refiners and through the pipeline.

As for "Brands" it doesn't matter.

Yours:; Grumpy

Answer 2

When you say "grade", you mean Regular or Premium, but when you speak of the brand of gas, then there is little difference in the name brand gas and the Costco gas. Costco buys its' gas from the same refinery that name brand gas co's get gas from. In fact, in most cases, the Costco gas is Chevron or Shell/Texaco etc., just that Costco agreed to buy a bulk amount at a bulk/discount price. This gas is usually the surplus gas from the major brand suppliers. What you want to watch out for is: a)don't fill-up while the tanker truck is refilling the ground tanks at a station(the sediment stirred up and goes to the pump, and some stations don't change their pump filters regularly). b)avoid stations that don't have a lot of traffic/customer volume, as gas sets longer in their tanks and can be degraded. c)find a brand that does well in your vehicle and stick with it. This avoids the variables when you have problems.

Answer 3

convinced... often times it does. I had a Subaru WRX. The guide suggested proper type. even as gas prices went up i tried the subsequent decrease grade, and it did not workout properly. It knocked and made noise and my mileage dropped way down. That motor vehicle changed into an exception however... it had a swifter and four cylinder engine fixed horizontally. you fairly had to pass by using what the guide suggested. the motor vehicle I had earlier that turned right into a Chevy Blazer and that i continually positioned mid grade in it. It did not require it, however it only looked as if it would run more effective and get more effective mileage with the mid-grade over time-honored. the way prices are literally... i'd say choose time-honored, then once a month or so even as your tank is thoroughly empty proper off with a more effective grade and word if there's a huge difference in mileage and if the engine only runs smoother.

Answer 4

The only differences in gasoline formuations are the additives added to it (no pun intended). If your car calls for regular then regular will work no matter what station you buy it from. Some gas may give you slightly better mileage - again depending on the formulation - but it would not be that significant.

Answer 5

All base gasoline is all the same for that octain rating. Example -Any company may have pumped in gas to the pipeline system in Houston Tx and received that many gallons in New York ( or any where ), but it is not the same they pumped , just the same amount. The difference is the additives / cleaners they add at the local distribution tank. If your car pings during acceleration you need to adjust your timing or switch to a higher grade .

Answer 6

The octane rating on gas is a measure of the gas' resistance to detonation. Higher octane won't add horsepower or burn cleaner, it will only be more resistant to detonation. Detonation is an uncontrolled burn in your cylinder that can do major damage to your engine. Regular should be fine unless the car manual states otherwise.

Answer 7

it depends on your car - unless your car's manual states otherwise you should be find using regular unleaded. I personally use Costco gas and have had no problems at all. From what I understand it's decent quality gas and not substandard.

Answer 8

the grade of gas does matter . ,depending on the car also. we would not put the economy grade in any of our cars because lower grade and or cheap gas can cause carbon build up in your engine causing you to get poor mileage and having less power overall ,leading to different troubles , treat your car right.

Answer 9

hi! i used to fill gas at costco, dundas st. mississauga, ontario, for 2months, for we all know its the cheapest in the market. i had to drive 30mins just to get there. but i noticed while driving i had to press down the accelerator 'harder' for my engine to give the kick, i often times having engine hesitations (which is not common with the leading brand). that's is when the gasoline sprays out more. at the end of the day i consume more gas than i used to. i often cross the border, one summer drove back to michigan, usa. before i consume only half the gas tank, but when i used costco gas, it took me 3/4 of the tank to get to michigan! this happend to me twice. i was shocked. this wasnt happening to me when i was using the leading brands. don't be fooled by its price, its just few of cents, but u consume more gas u didn't actually saved money instead u'r paying more. since then i went back to where i used to fill my tank. i'd suggest petro canada, esso or canadian tire. i find costco gas low grade.

Answer 10

It depends on you motor. Check your owners manuel and see what grade they recommend. I donot recommend using mid grade. you either use high test or regular. If the oil compines would get rid of mid grade they would save millions of dollars and that would lower prices for the consumer.