Diesel Oil in a Petrol

[GOONA]

Hey Guys,

Has anyone ever used diesel oil in a V6 petrol to give the engine a bit of a cleansing? A mate recommended to run some diesel oil for a 1000km's or so to give the engine a bit of a flush which should hopefully quieten the lifters down too.

I know diesel engine oil has a high detergent level which theoretically should give it a bit of a cleanse, but will it actually do any damage i.e. to seals, etc?

Cheers,
GOONA

[steverisingsun]

The 'detergent' part is not a cleaner as such but simply holds particals in suspension. Most diesel oils are rated for pre 2000 petrols.
You could use it full time.
Steve

[GOONA]

Cheers Steve,

By cleanse I meant more of a flush. Do you think you will be able to notice a difference after running the diesel oil through it?

[steverisingsun]

Hi, no not really.
If you use an engine flush [picked up from most auto shops], change the oil and filter. Then use Wynns Tune Up for the lifters. Failing this its rocker gear off.
Steve

[GOONA]

Well ended up putting the oil in it, if I don't notice a difference I'll try the engine flush. Am not expecting much after 190K's on it.

Thanks

[4ePajero]

Oils for diesel engines are usually 'better' than those for petrol engines - just because diesel engines put higher demands on the oil.

Caltex Delo 400 Multigrade is an excellent oil, suitable for both petrol and diesel engines. It's most probably 'over-kill' for a petrol engine.

[subarursliberty]

Once there stuffed the stuffed. You could run a thinner oil when you fix it. My last car was know for being bad with lifters with subaru rebuilding some engines. I was running a thin oil 5w30 from memory and it seemed to help but it came back eventually. I never fixed them though, It was an engine out job.

[Brendan-s]

6G72, 330,000km on the clock. Went through half a dozen different oils trying to find a quiet one when I first got it until a mate suggested Fuchs 25W60, which he reckoned quieted down their old 6G72 Triton.

Difference is huge! Before it used to tick like a bastard, now when it's cold it'll tick for 10 seconds then goes away. Brought oil pressure up almost a bar at both idle and under load too.

So before you stuff around just try this stuff. It's good.

[GOONA]

Yeah to be honest I'm not expecting much, just thought a quick flush might do something. Will be putting in some good oil afterwards, was thinking either Fuchs or Penrite.