A friend of mine sent me this email about injector cleaner, any thoughts?
"I want to tell you that my jag and 5 other cars and vans I told to use this stuff has drastically improved the gas milage and drive ability. Hwy milage of jag went from 24 mag to 29.8 mag after using this. The engine is smoother and quiet. The cars get varnish on the injectors and carbon buildup on intake and exhaust valves. This is like magic. Put in your jag and fill with gas drive full tank to almost empty. Then refill. WOW. JIM"

 

Well since no one replied, I did a forum search for "injector cleaner" and here's the link for the info I found.

https://www.jaguarforums.com/forum/x...leaner-113602/

 

Seafoam and BG44 I have professionally used with great results

 

I use and recommend BK44 as Brutal posted.
Another vote for Seafoam too!
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I´m using Liqui Moly Valve Clean https://www.liqui-moly.com/en/us/val...n-p000041.html in every car on long Trips. Smooth ride and lower gas consumption. Highly recommended!