J
Jon
Guest
This question refers to the UK Ford zetec E engine (1.8 and 2.0 l).
I know that Ford recommend that only 5w 30 oil is used in all the zetec engines (zetec SE and zetec E) and I fully agree that only this grade is ever used. However, if during a service a mechanic put in 10w 40 instead of 5w 30 and the owner, unaware of this mistake, drove the car for 3 or 4 months covering say 2000 miles, what if any damage would occur and also if the owner then (after 3-4months) became suspicious because of reduced fuel economy decided to change the oil and made sure this time it was definitely 5w 30 that went in, would any more damage be caused to the engine or is it the case that damage (if any) is only done whilst the 10w 40 oil was in the engine ?
I have read conflicting stories on the internet that it doesn't do any damage and others that say it causes premature wear, valve/tappet problems and blocked oilways in the lubrication system.
Thanks
I know that Ford recommend that only 5w 30 oil is used in all the zetec engines (zetec SE and zetec E) and I fully agree that only this grade is ever used. However, if during a service a mechanic put in 10w 40 instead of 5w 30 and the owner, unaware of this mistake, drove the car for 3 or 4 months covering say 2000 miles, what if any damage would occur and also if the owner then (after 3-4months) became suspicious because of reduced fuel economy decided to change the oil and made sure this time it was definitely 5w 30 that went in, would any more damage be caused to the engine or is it the case that damage (if any) is only done whilst the 10w 40 oil was in the engine ?
I have read conflicting stories on the internet that it doesn't do any damage and others that say it causes premature wear, valve/tappet problems and blocked oilways in the lubrication system.
Thanks