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Hiya Chaps and Chappesses,
I recently got a Vectra C 2005 model 1.9 CDTi.
I drive the car like a Saint to save fuel. I rarely go over 2000 revs !!!
When I took it for its MOT one of the mechanics mentioned that these diesel engines get full of "coke" if you don't drive them hard. (I presumed he didn't mean the fizzy drink - but loads of sooty deposit type things !!)
Is there anything like an additive that I can put in my fuel, maybe every six months or so, that will stop the coking or blow out all the deposits from my engine and in particular EGR Valve which I had to replace because it was all sooted up ???


PS (.My car doesn't have a DPF on the exhaust)... I don't think.
 

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All you need to do really, when the car is warm accelerate hard from traffic lights or just put the pedal down every so often but safely. it also helps with emmissions too as it does help thinks get up to temp quicker. but you dont need to do it that often.
 

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as a truck driver, people that drive slower than a truck on a motorway and indeed joining a motorway,i think should be banned,a total hazzard to other peoples safety

drive it like its stolen
 

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Agreed! I don't speed but do drive to speed limits (hubby says I drive too fast but he is used to 53 seater coach and a clapped out Escort). I still manage over 50mpg on runs, 45ish round town - it's smooth braking and accelerating that saves fuel. Modern engines are not designed to run like you are driving yours, hence the coke problem. Give it a blast on one of your Lancs motorways especially if you are pulling out in front of erroneusbogz in his truck!
 

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this is how i drive mine as well barely go above 2k revs to save fuel, looks like diesel treatment once every couple months and a hardcore revving session should do the trick
 

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Agreed! I don't speed but do drive to speed limits (hubby says I drive too fast but he is used to 53 seater coach and a clapped out Escort). I still manage over 50mpg on runs, 45ish round town - it's smooth braking and accelerating that saves fuel. Modern engines are not designed to run like you are driving yours, hence the coke problem. Give it a blast on one of your Lancs motorways especially if you are pulling out in front of erroneusbogz in his truck!

yes because if i get a 52 mph brigade member joining a motorway,i wont move over
 

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After couple of Mway trips in mine started thinking again about revs - turbo only kicks in about 17 to 1800 rpm. The engine is burning fuel most efficiently with the turbo so if you drop much below 2k you will be using MORE fuel, not less! Have also found get better mpg with branded fuel, works out more economical as supermarket stuff (but we are lucky to have a cheap Shell garage nearby!)
 

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Agreed people who dont accelerate to the speed of the traffic they are joining should be shot, especially if they are in the fast lane of the slip, I will take this time to gerr at trucks in the slip fast lane GErrrrrrrr. ;-)
as a truck driver, people that drive slower than a truck on a motorway and indeed joining a motorway,i think should be banned,a total hazzard to other peoples safety

drive it like its stolen
 
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