what effects would useing plain unleded gas in my 2001 jetta vr6

Asked by Mar 07, 2013 at 11:54 AM about the 2001 Volkswagen Jetta

Question type: General

what effects would useing plain unleded gas in my 2001 jetta vr6

9 Answers

lot of arguement and contreversy amongst the troops, tired of arguing...if the "GO juice" makes it go...that's all that is needed...we aren't entering into a rally, and do not need all that performance...but cheap.

275,125

Also you might see a decrease of 1-2 MPG. I won't argue, just say I run what is recommended.

104,755

Because of the decrease in efficiency (MPG's) it's sometimes more cost effective to buy the higher grade gasoline. -- I had an Astro Van that was cheaper to operate (cost per mile) using a mid-grade gas.

as compressions get higher, one might think it's just that much closer to diesel compression like a gas 9:1 or diesel 25:1...which if diesel is OIL, and not full of volitiles, like higher octane fuels...like higher compression=lower quailty fuel...so having a 93 octane should be used with a relitavely low compression...one might think.

the cold air has streamed in, and cannot feel my fingers typing anymore- Arctic BLAST---hold onto your wooly-caps 'cause you're soon to get hit with an ARCTIC BLAST!

Bob you have it backward. 91 octane is for higher compression engines. 87 is for lower, it takes less compression to have it ready to ignite by the spark. There is more energy in a gallon of diesel than a gallon of gasoline. The higher the compression the more octane # is necessary for complete combustion .....that's why if it "diesels", like continues to run (albeit real rough) after you shut the key off it's being ignited by heat and compression alone and a higher octane corrects that, am I making any sense at all? Sometime I have a hard time getting thoughts out right...

1 of 1 people found this helpful.

it's all about hydrocarbon chains~

4,935

The 20cent/gal difference in price between regular and premium equates to about a $3 difference per tank-full. How about you give your well-engineered German machine the fuel it deserves and just drink one less latte or beer this week.

1 of 1 people found this helpful.
665

MK4 (1999-2004) VR6s have a slightly higher compression ratio compared to the MK3 VR6s (10.5:1 as opposed to 10:1). This is an even more compelling reason to run premium grade gas in your VR6. High compression engines require premium gas because the air/fuel mixture is compressed a lot before being ignited. Regular gas will ignite solely because of the immense pressure, as opposed to being ignited by the spark. When this compression based ignition happens (called pre detonation), it causes engine knock. Your engine's computer will compensate for this by pulling timing (and reducing power), but it can only pull timing so much. Not only could this damage your engine internals, but it also makes your engine become less efficient and the fuel consumption will suffer. Long story short, run the recommended 91 octane or higher, and it will pay off in the long run.

2 of 2 people found this helpful.

Your Answer

Jetta

Looking for a Used Jetta in your area?

CarGurus has 32,542 nationwide Jetta listings starting at $800.

ZIP:

Volkswagen Jetta Experts

  • #1
    Goodwrench707
    Reputation
    2,580
  • #2
    Deathjam4
    Reputation
    2,090
  • #3
    Tom Demyan
    Reputation
    1,590
View All

Related Models For Sale

Used Volkswagen Passat
342 Great Deals out of 26,796 listings starting at $695
Used Honda Civic
573 Great Deals out of 52,764 listings starting at $1,500
Used Honda Accord
838 Great Deals out of 87,589 listings starting at $1,444
Used Volkswagen GTI
104 Great Deals out of 7,586 listings starting at $1,400
Used Volkswagen Golf
85 Great Deals out of 3,803 listings starting at $695
Used Toyota Camry
1,072 Great Deals out of 76,710 listings starting at $1,100
Used Toyota Corolla
888 Great Deals out of 69,845 listings starting at $1,479
Used BMW 3 Series
1,140 Great Deals out of 33,943 listings starting at $1,209
Used Audi A4
246 Great Deals out of 12,067 listings starting at $1,450
Used Nissan Altima
1,145 Great Deals out of 74,689 listings starting at $900
Used Ford Focus
595 Great Deals out of 69,061 listings starting at $1,750

Used Cars For Sale

2017 Volkswagen Jetta For Sale
64 Great Deals out of 3,328 listings starting at $10,665
2016 Volkswagen Jetta For Sale
42 Great Deals out of 1,710 listings starting at $6,000
2015 Volkswagen Jetta For Sale
163 Great Deals out of 3,641 listings starting at $5,999
2014 Volkswagen Jetta For Sale
134 Great Deals out of 2,805 listings starting at $4,200
2013 Volkswagen Jetta For Sale
47 Great Deals out of 1,228 listings starting at $4,495

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.