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4 of 9 people found this review helpful
coupe decool
By mintjeeplup on
Vehicle
1992 Cadillac DeVille 2dr Coupe
Review
Have had the 1992 coupe devile now for 5 years and 50000 miles..its got 104000 miles now and I just want to give a shout out on how ta fix the car if the gas mileage goes down the toilet..originally I was getting 20 mpg or better when @ about 95000 miles I suddenly went down to 17 mpg then 14 mpg and finally 13 mpg..I was stuck with a lemmon So I changed the spark plugs and the air filter and got...14mpg thru 2 tanks of gas and it was at that point that I started adding fuel injection cleaners to my gas tank..3m fuel injection cleaner worked imiedieatly but I wanted to flush those injectors but good So I bought One gallon of seafoam for like 60$ and now i get 20 to 22 mpg ..just add 16 oz
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By swagger916
on 04/24/12 01:57 AM (PDT)

Hey im trying to seafoam my cylinders as well. where did you pour it? i was lookin straight in the intake but is there a vacuum hose you used or what? An answer and where to pour WOULD BE GREATLY APPRECIATED. Thanks, Adam. First comment. yeeha!

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