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#1 @leeaustinrose

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Posted 08 November 2013 - 11:06 AM

Hi guys I've gone and added about 3/4 of a litre of Shell Helix Diesel oil (10w-40) to my 1.4L Ford Focus Petrol engine! can anyone advise me whether I need to drain the engine and start again or if I'll get away with it as a one off?

 



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#2 jamesm182

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Posted 08 November 2013 - 11:08 AM

It's not the ideal oil for the car but I don't think it will do any real damage. The Focus should ideally run a 5w 30 semi synthetic but you can run 10w 40 for certain weather conditions. In winter though the 5w 30 would be better as it will get to the top of the engine quicker. The only real difference between a petrol 10w 40 and a diesel one is additives as far as I know.



#3 @leeaustinrose

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Posted 08 November 2013 - 11:49 AM

Many thanks James! Think I'll avoid the oil drain then! :rolleyes:



#4 Lenny

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Posted 08 November 2013 - 11:53 AM

On your next service purchase a can of wynnes engine flush,
Pour in to your engine oil filler as described on the tin,
Run the engine at 2,000rpm for 10 minutes
Then drop out the oil,

This will flush out the system,
Eliminating any carbon or clumps caused by two grades of oil combining,
Then fill up with new oil as normal,
No hassle.

#5 georgen

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Posted 11 November 2013 - 07:48 PM

cheaper makes of oil are now selling the same stuff for petrol and diesel engines, my understanding was diesel oil was a better oil than petrol oil, but this was before synthetic oils came out. 3/4 of a litre is a canny top up, me thinks you should check it more often and as a one off I wouldn't worry that much as the way I look at it any oil is better than no oil when push comes to shove, but as I said as a one off, as Lenny says next oil change put a flush in first and nice new filter and treat her to some nice correct oil, she will last longer.



#6 wase16ll

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Posted 11 November 2013 - 08:10 PM

wouldnt worry about it, you put so little in, which will be immediately mixed/contaminated with old oil anyway, a flush at the next oil change is a good idea if only to put your own mind at ease.



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