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diesel oil in petrol engine
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Author:  chris_mac [ Thu Aug 19, 2010 8:48 am ]
Post subject:  diesel oil in petrol engine

G'day

that topic was partly covered, however I have one question. Many people said that diesel engine oil can be used for petrol engine and is beneficial because of its cleaning abilities. So can I use permanently any semi synthetic diesel oil which is lets say 10W-40 or 15W-50 and it will be ok for the engine or should I look at some other oil specification?
do you recommend to use engine flash oil? idle the engine with it for 15-20 min and than drain oil and use diesel one?

has anyone use engine stop leak, which you add to the oil and it makes the seals to swell a little bit so they stop leaking. does it work and is it safe to use?

except for the sump leak which I will fix there is a little sort of sweat not leak from around lower passenger side timing belt area. it doesn't even make the oil drip at all its just wet. so I was wondering if it is worth to use that engine stop leak stuff
thanks

Author:  ajsr [ Thu Aug 19, 2010 8:58 am ]
Post subject:  Re: diesel oil in petrol engine

yes you can permenantly use a diesel oil in you zook, there are several ratings on diesel oil and personally I'd use one with a CI-4 rating or lower.
the CJ-4 is for particulte filters and the like and they take a lot of the good stuff in diesel oils out to meet the rating.
oils like castrol rx , shell rimula nulon extra protection diesel etc are perfect, I run them in all my petrol stuff.

Author:  royce [ Thu Aug 19, 2010 9:15 am ]
Post subject:  Re: diesel oil in petrol engine

make sure it has some kind of S rating, likely be SG or SH or SJ

better to fix the leaks, that timing cover one is the cam or crank seal and the oil is currently destroying your timing belt, just replace em all :)

Author:  PJ.zook [ Thu Aug 19, 2010 9:19 am ]
Post subject:  Re: diesel oil in petrol engine

You can use diesel oil in youre petrol engine, but its recommended not to do it if your engine is getting old, as it will clean all the carbon from your engine. This is normally a good thing, but that carbon is sealing your old rings. Get rid of the carbon and she will smoke more than Cheech and Chong recording Hits From The Bong.

Author:  royce [ Thu Aug 19, 2010 9:30 am ]
Post subject:  Re: diesel oil in petrol engine

Where does the carbon seal, exactly?

Author:  chris_mac [ Thu Aug 19, 2010 12:16 pm ]
Post subject:  Re: diesel oil in petrol engine

royce wrote:
make sure it has some kind of S rating, likely be SG or SH or SJ

better to fix the leaks, that timing cover one is the cam or crank seal and the oil is currently destroying your timing belt, just replace em all :)


Roy, is it hard to replace cam and crank seal? is it a big job? do i need to remove the engine to do it?

Author:  royce [ Thu Aug 19, 2010 8:42 pm ]
Post subject:  Re: diesel oil in petrol engine

pull off timing belt and pulleys and replace seals, not overly difficult just fiddly

Author:  Munster [ Thu Aug 19, 2010 8:59 pm ]
Post subject:  Re: diesel oil in petrol engine

Is the crankshaft pully bolt reverse thread?

Author:  Jester [ Thu Aug 19, 2010 9:03 pm ]
Post subject:  Re: diesel oil in petrol engine

nope its a standard thread, only some renaults and hondas i can think of having LH thread

Author:  chris_mac [ Thu Aug 19, 2010 11:40 pm ]
Post subject:  Re: diesel oil in petrol engine

thanks for advise,
how I could know that tensioner needs replacing? when I changed timing belt I looked at it, but haven't noticed anything wrong with it and left the old one

Author:  BlueSuzy [ Thu Aug 19, 2010 11:46 pm ]
Post subject:  Re: diesel oil in petrol engine

Tensioners are just a bearing. So when you don't have the belt on, just turn it and see if it spins nice, any shudders means it stuffed, and any side to side looseness means its stuffed also.

Author:  chris_mac [ Fri Aug 20, 2010 2:54 am ]
Post subject:  Re: diesel oil in petrol engine

I give it a go with diesel oil I got this one, will it be ok? (it has the SL symbol in it, like a petrol version of that oil)

nulon 15W-40 high protection diesel formula, SAE15W-40, API CI_4/SL

Author:  ajsr [ Fri Aug 20, 2010 2:58 am ]
Post subject:  Re: diesel oil in petrol engine

it will be fine

Author:  royce [ Fri Aug 20, 2010 3:26 am ]
Post subject:  Re: diesel oil in petrol engine

perfect

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