Has anyone used, or have any feed back on these chips that can increase HP and improve gas mileage?
JAGUAR S-TYPE GF Peformance Chip
Any feedback would be great. Thanks

 

Garbage! Stay away unless you want to unleash electrical havoc!

 

I figured as much! Sounds like a good idea because these Jag's................ NOT very good on gas mileage!!

 

Does anyone know of any of these performance/gas saving type chips that won't screw everything up? Gas was almost at $5/gal - premium last month! Anyway to increase gas mileage without any chips? Besides the obvious of filters, plugs, etc.

 

No such chip can exist because what would need to be done would be a complete reprogram of the PCM.

Realistically, because of emissions laws you cannot expect to improve MPG - except by buying a different car (one that's lighter).

Things you can do are those done by the hyper-milers (such as your driving style, thinner tires, higher tire pressures, etc). Chips are not the way to go unless you want to risk serious engine damage.

 

There are no chips that will accomplish this, just as there are no plugs or filters, magic additives (or anything else) that will positively affect fuel consumption.

If you're not achieving close to 25-30 mpg on flat level ground at normal highway speeds, there's something wrong with your car.

 

The car checks out great! All maintenance has been completed. I wish I was getting 25-30 mpg, but it aint happening! According to the owner’s manual and dealership the 2000 should get about 16 mpg/city & 23 mpg/highway.

I’ve been getting roughly 15 mpg/city, last weekend I took a 4 hour drive over to Eastern WA and got roughly 22 mpg/highway.

It appears that I’m getting close to what the book and dealer says, however, it would be nice to improve the mpg if possible.

 

I have a 2000 S Type w/ 4.0 V8 with almost 200K miles on the drivetrain. I'm getting between 18 - 18.5 MPG city and 25 - 28 MPG highway. I'm very meticulous about maintenance, including using OES plugs/coils and ensuring I have high end tires installed, properly inflated and fully balanced - rims balanced too and getting my suspension checked/adjusted to Brutal specs every 9 - 12 mos.

One thing I did was install a K&N airfilter. Good difference...

 

Gas is $2.98/gallon in Houston.
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$2.98 for premium? or Regular 87 stuff...

 

Near enough $10/gal here...

 

Yes me too. I took mine out and put a stock filter in- MPG improved by 1.5 MPG.

 

Assuming the car is in perfect running order, the only real thing you can do is change your driving style. No magic bullets. Are you calculating MPG by hand or via onboard computer? Do you have the OEM sized tires/wheels on the car?

Other stuff helps, like not hauling around extra stuff in the trunk, proper inflation etc. I know of one member here who got creative with some racing tape around the front spoiler/body panel gaps doing some tests with MPG - can't recall his username but he's on here from time to time.

Maybe yank off the side view mirrors if you don't need em (that is a joke...a poor one) to improve aero.

In all seriousness, I wouldn't even want to try to hypermile my Jag. They are fun to drive, fuel is part of the cost of having fun. Enjoy it.

 

'06 stype VDP (4.2 normally aspirated) - My onboard computer shows me getting nearly 29 mpg running at 75 mph at touch less than 2,000 rpm. What I get around town doesn't matter much - I don't do that many miles around town. As someone said elsewhere on this forum, you're getting '70s muscle car performance with comfort, a civilized ride and good gas mileage into the bargain.

 

Agreed. If the Jaguar sales guys had attempted to tell me that my wife would routinely get 33 mpg in our S-Type 3.0 on her solo trips to and from Tampa to visit her parents, I would have immediately accused them of lying to me....

 

Personally I just use a light foot on the gas pedal. I see a red light from a distance and i lift my foot and let the cars speed carry it there rather then holding down the gas then slamming on the brakes (i see that all the time) Im averaging 16-18 mpg city/highway combined. I used to get 13-15 so efficient driving def improves mpg.

 

I have about a 55 mile round trip to work and back each day. About 75% of that is on a 55 and 65MPH road. I've been averaging 22 MPG and 415 miles out of a tank.......pretty darn good for 400 ponies and 4200 pounds.......