do i have to use premium gas

Asked by Jun 20, 2013 at 12:29 PM about the 2004 Mercedes-Benz CLK-Class CLK 320 Coupe

Question type: Maintenance & Repair

i now use 1/2 tank medium grade & 1/2 tank premium

2 Answers

325

If your engine has a compresion ratio of 10:1 or higher (which your car has) then you should use premium. If it has a turbo or a super charger then use premium. These are high performance engines... The tolerances are so tight that they are less forgiving when the combustion temp is off, or there are contaminants. If you use regular in a top shelf engine then you may encounter knock and a loss of efficiancy over time that offsets the cost savings of the gas and could lead to higher maintenance cost like plugs and seals needing more frequent repairs. Normal engines don't need it, but are not as efficiant. (less zoom for the boom) Even with normal engines I like to cycle the good gas every third tank just to run the detergents through, it keeps em clean and happy over time.

3 of 3 people found this helpful.
116,435

Premium is required in your vehicle. http://www.edmunds.com/mercedes-benz/clk-class/2004/features- specs.html

3 of 3 people found this helpful.

Your Answer

Mercedes-Benz CLK-Class Experts

  • #1
    Francisco Gomez
    Reputation
    1,120
  • #2
    jsorto
    Reputation
    1,010
  • #3
    bobkat
    Reputation
    880
View All

Related Models For Sale

Used Mercedes-Benz E-Class
696 Great Deals out of 22,693 listings starting at $1,450
Used Mercedes-Benz C-Class
886 Great Deals out of 28,327 listings starting at $2,001
Used Mercedes-Benz SL-Class
65 Great Deals out of 3,520 listings starting at $4,500
Used Mercedes-Benz CLS-Class
82 Great Deals out of 2,352 listings starting at $3,500
Used Mercedes-Benz SLK-Class
94 Great Deals out of 1,343 listings starting at $1,492
Used Mercedes-Benz S-Class
148 Great Deals out of 8,119 listings starting at $1,200
Used Mercedes-Benz CL-Class
15 Great Deals out of 513 listings starting at $5,500
Used BMW 3 Series
1,068 Great Deals out of 32,575 listings starting at $1,200
Used Mercedes-Benz M-Class
332 Great Deals out of 6,308 listings starting at $2,400
Used BMW 6 Series
73 Great Deals out of 2,441 listings starting at $5,995
Used Chevrolet Corvette
165 Great Deals out of 17,405 listings starting at $3,000
Used BMW 5 Series
520 Great Deals out of 15,471 listings starting at $1,650
Used Ford Mustang
569 Great Deals out of 38,807 listings starting at $1,895

Used Cars For Sale

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.