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.

246,045

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

99,065

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~

4,735

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.
605

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

Add photo

Related Questions

Jetta

Looking for a Used Jetta in your area?

CarGurus has 44,098 nationwide Jetta listings starting at $800.

ZIP:

Search Volkswagen Jetta Questions

Volkswagen Jetta Experts

#1 Goodwrench707
Goodwrench707
Reputation 2,340
#2 Deathjam4
Deathjam4
Reputation 1,780
#3 Scott Sr.
Scott Sr.
Reputation 1,420
View All

Related Models For Sale

Used Volkswagen Passat
343 Great Deals out of 25,102 listings starting at $999
Used Honda Civic
865 Great Deals out of 85,137 listings starting at $500
Used Volkswagen GTI
100 Great Deals out of 8,291 listings starting at $2,400
Used Honda Accord
1,036 Great Deals out of 68,902 listings starting at $1,000
Used Volkswagen Golf
67 Great Deals out of 4,701 listings starting at $1,200
Used Toyota Corolla
974 Great Deals out of 69,275 listings starting at $1,999
Used BMW 3 Series
1,008 Great Deals out of 31,014 listings starting at $975
Used Toyota Camry
1,195 Great Deals out of 84,713 listings starting at $750
Used Audi A4
296 Great Deals out of 10,584 listings starting at $1,200
Used Nissan Altima
1,287 Great Deals out of 75,641 listings starting at $1,695
Used Volkswagen Beetle
169 Great Deals out of 9,279 listings starting at $1,950
Used Ford Focus
771 Great Deals out of 54,874 listings starting at $1,200

Used Cars For Sale

2017 Volkswagen Jetta For Sale
10 Great Deals out of 27,212 listings starting at $10,117
2016 Volkswagen Jetta For Sale
68 Great Deals out of 2,136 listings starting at $8,988
2015 Volkswagen Jetta For Sale
103 Great Deals out of 2,961 listings starting at $6,699
2014 Volkswagen Jetta For Sale
184 Great Deals out of 4,690 listings starting at $4,750
2013 Volkswagen Jetta For Sale
60 Great Deals out of 1,555 listings starting at $4,999

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.