Quote:
Originally Posted by Greene Meanie
With our Cars being DI does Lucas Upper Cylinder Lubricant help or hurt your mpg. The reason I ask is I have been using it consistently for the last 6k miles and my MPG has gone down from 29 to 26 even 24 on hills. I am starting to wonder if this is hindering my LLT ' S MPG. Any other input or facts would be greatly appreciated.
|
Nothing is truly a tune up in a bottle. That's marketing mumbo-jumbo. However various products that clean injectors etc can have a beneficial effect without being a sham. Back when you could easily buy tetraethel lead suspended in kerosene by the bottle for example, it absolutely had the desired effect on my old engines that were made to run on leaded gas.
In order to asses the effects on your car, I'd suggest reviewing the parameters of your testing. My guess is it was not controlled very much, it's simply a time/distance comparison, you've used the product for X miles over Y months. Your decreased gas mileage can have a whole lot of reasons which do not need this product in order to have taken place.
Easiest path: stop using it for the next 6K miles and see if your MPG goes back to normal.