My Mercury Mariner 2005 SUV takes regular gas. Can I use mid grade or premium gas? Would doing that harm the engine?

Asked by Oct 18, 2012 at 02:43 PM about the 2005 Mercury Mariner Premier

Question type: Maintenance & Repair

2 Answers

i don't really think it would ? if any thing it would be a bit more expensive but i will pretty much save your fuel pump in the long run i have a 87 t bird i converted it to preimo fuel i can get 300miles to 1/4 tank of gas, when i had it on regular it would suck back 1/2 tank going 150miles , this is the oldest car i have in my yard ans it runes better then all my newer models never had to go to the shop ever i think this will clean out any old regular gas in ur cars tank and and give you a bit more mileage :-) i have a 01 navigator when i bought it i filled it up with the high grade stuff it said on the compus system 250miles till empty ? Not good, from Edmonton to the Yukon a 2 day drive, i kept using premium by the time i finally got home after filling up with premium all the way it now ways 780miles till empty i liked those odds


premium will burn faster yes, it is a "higher percent of alcohol" in turn being cleaner, so if you use a better grade fuel you save in the long run in filters and components, however is more costly. To explain why there is a difference is simply that types of cars are designed to operate differently, most cars, as in everyday commuters have (pending location), 87-89-91-93-97, etc. those are fine, however, in the Ferrari, or (highly tuned machines), they don't like to run on them, the engines are designed for very high octane, if you were to use a gas that your car "didn't like", it would let you know by the engine knocking, or vibrating badly, that is for the most part all you would experience, but can do harm, in the long run to the sensors..i always tell people use what is recommended, the companies invest millions to figure out what works best, and we are not as smart, so why would we try to be.....same with engine oil, USE REGULAR, not synthetic, etc....hope i helped :)

1 of 1 people found this helpful.

Your Answer

Mercury Mariner Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Ford Escape
915 Great Deals out of 104,741 listings starting at $550
Used Mercury Mountaineer
14 Great Deals out of 761 listings starting at $1,500
Used Ford Explorer
835 Great Deals out of 63,811 listings starting at $600
Used Chevrolet Equinox
770 Great Deals out of 74,993 listings starting at $1,499
Used Jeep Grand Cherokee
786 Great Deals out of 72,877 listings starting at $999
Used Honda CR-V
556 Great Deals out of 65,824 listings starting at $1,800
Used Mazda Tribute
7 Great Deals out of 608 listings starting at $1,850
Used Toyota RAV4
493 Great Deals out of 64,985 listings starting at $1,995
Used Jeep Liberty
105 Great Deals out of 5,950 listings starting at $1,300
Used Honda Pilot
431 Great Deals out of 38,423 listings starting at $999
Used GMC Envoy
27 Great Deals out of 1,489 listings starting at $1,400
Used Toyota Highlander
448 Great Deals out of 43,867 listings starting at $1,750
Used Mercury Mariner Hybrid
3 Great Deals out of 59 listings starting at $3,495

Used Cars For Sale

2011 Mercury Mariner Premier For Sale
22 listings starting at $4,950
2010 Mercury Mariner Premier For Sale
57 listings starting at $4,650
2009 Mercury Mariner Premier For Sale
32 listings starting at $3,999
2008 Mercury Mariner Premier For Sale
45 listings starting at $3,480
2007 Mercury Mariner Premier For Sale
11 listings starting at $4,975

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.