Fuel amd spark plugs

[johnnygti]

Hey guys another few weeks have went by with terrible mpgs with eco driving, changed the spark plugs the other day and they were very lose? As in lose took no pressure to unscrew ,my mate said this would give low compression? Since then i have put in super spark 4s and the car seems a great deal quicker and iv almost double my mpgs could this be right or has my car mpgs just shot up randomly

 

[Dave04]

That would sound about right, if there was room for gas to escape around the plug then you will have less pressure pushing the piston back down again, so a mix of new and properly tightend plugs will most deffrently increase performance and give better mpg.

 

[vile]

Glad your sorted Jonathan don't you just love the easy fixes.

 

[johnnygti]

Yeah very chuffed i dont need to sell it now ha i love this car but fuel like that i could run my mates 350z cheaperlol