Thread: diesel oil into petrol car?

Originally Posted by shorty943

During my Navy days, an oil we called, OMD113, went into all Internal Combustion Engines. From the big main diesels of subs and patrol boats, to the generators and boat engines of the ships, even into the Admirals Humber Super Snipe and the ships Mini Moke, it was even mixed into super petrol for the rescue boats outboards.

OMD113, Oil Mineral Detergent, the 113 is a Milspec viscosity index, approximately equal to 20\40.

I'd say use it.

omd 113? dont you mean omd 110 or 115? or are you talking back in the day when the boats had oars and drumsmend?

113 is replaced by 115 now......

Originally Posted by Blknight.aus

omd 113? dont you mean omd 110 or 115? or are you talking back in the day when the boats had oars and drumsmend?

113 is replaced by 115 now......

OM 100 for steam. No detergent.

OMD 113 for ICE's.

I did get discharged in 1978, so there may have been an upgrade or 2 since then.

Sorry I should have said the Impreza has done 86k.

I have a 20L drum of each the following oil in our shed;
***********************
Castrol FMX 15/40
APi sm/cf
Part#117822.
Label on drums says;
"Synthetic Fortified motor oil recommend for petrol & light Diesel engines"

***************************
Castrol RX Super
SAE 15w/40
APi ci-4
************************
Castrol GTX Diesel
15/40
B3/A3
APi SL/CF
**************************

So I have heaps of oil to play with , but Im thinking it may be an issue if I use it in the Subaru.....So Im happy to hear anymore input .

I may even sell the FMX on ebay because I cant even use it in our '06 RA Rodeo.

In the bad old day when the Valiants were still being made, its was recommended to run Dieso oil in the Hemi 6s to fix a rattly lifter problem that was inherit with the 245 ELB motors, using it in engine with lots of ks is not wise, best to err on the side of safety and dont run it in a Subey

Thankyou for everybodys input/comments.

I spoke to our local Subaru dealer today and asked what they use.......And was very shocked what he said.

Valvoline XLD 20/50

The dealer/owner/head tech man and gen great bloke said they have always used that, and in 30 odd years never had any probs using it.

He also said the oil spec in the owners manual is for the euro countrys only ie 5/30 or 10/30....... I thought its abit strange has Subaru oz should have a stick on bit stating that we should use a certain spec oil

So you can buy that oil anywhere and its bloody cheap, I have bought that brand and type for the later model commodore's Ive had in a previous life.....

He also said not to use the Diesel oil as it has way to much cleaning power.....I trust him so I will not use it.....But thanks very much to those who had some input anyway

Originally Posted by amshaw

<snip>

He also said not to use the Diesel oil as it has way to much cleaning power.....I trust him so I will not use it.....But thanks very much to those who had some input anyway

you're kidding, right ?

most mechanics know eff all about oils and lubricants, only what a rep or salesman tells them. They also often use bulk, cheap oil at dealerships, and it often falls outside recommended oil specs....
There is a big difference between "....having no problems.... " and using something that works a bit better.

way too much cleaning power ? in an engine that's only done 80,000km ? how much crud will have built up in that time with good lubricants and regular servicing ?
check the specs on most diesel oils, they are dual rated for general fleet use. The really good diesel oils are SL/CI-4+ and all the relevant ACEA specs. The API SL petrol engine oil spec has only been superseded by SM in the last twelve months or so, and most diesel oils don't meet it as the additive package is too robust. The new CJ-4 spec will meet the SL spec as it is a very low ash spec, but I don't know of any CJ-4 spec oils yet available in Oz.

Originally Posted by rick130

you're kidding, right ?

most mechanics know eff all about oils and lubricants, only what a rep or salesman tells them. They also often use bulk, cheap oil at dealerships, and it often falls outside recommended oil specs....
There is a big difference between "....having no problems.... " and using something that works a bit better.

way too much cleaning power ? in an engine that's only done 80,000km ? how much crud will have built up in that time with good lubricants and regular servicing ?
check the specs on most diesel oils, they are dual rated for general fleet use. The really good diesel oils are SL/CI-4+ and all the relevant ACEA specs. The API SL petrol engine oil spec has only been superseded by SM in the last twelve months or so, and most diesel oils don't meet it as the additive package is too robust. The new CJ-4 spec will meet the SL spec as it is a very low ash spec, but I don't know of any CJ-4 spec oils yet available in Oz.

Ok thanks for that I guess.......Looks like Im back to square one again .....nothing is easy is it anymore is it.....All I want to do is put some good oil in the subaru, but use what I have in the shed if I can , but not at the risk of blowing up the motor......

Owners Manual say to use;

API SJ or SH
CCMC G4 or G5
ACEA A1, A2 or A3

SAE Viscosity No; 30, 40, 10w-50, 20w-40, 20w-50.

Im in the south western part of Vic, gets to about -5 dec to 45 dec out here (min & max temps), so what sould I use?

Happy to hear more

I have a 20L drum of each the following oil in our shed;
***********************
Castrol FMX 15/40
APi sm/cf
Part#117822.
Label on drums says;
"Synthetic Fortified motor oil recommend for petrol & light Diesel engines"
***************************
Castrol RX Super
SAE 15w/40
APi ci-4
************************
Castrol GTX Diesel
15/40
B3/A3
APi SL/CF
**************************

Sorry Andrew, just re-read what I wrote and it sounds a touch, err, strong.

Personally I'd use any of those oils in the Suby till the drum is empty and be happy.
GTX Diesel and FMX are dual rated oils and easily exceed the API specs Subaru lay down for your engine (SL and SM respectively) and I personally wouldn't go heavier than an xW-40 in a petrol engine these days, you are just creating more drag without any extra protection.
In the US no one uses anything heavier than an xW-30 in Subies, even in Texas and Arizona where it is at least as hot as here in summer. The Yanks just can't believe we use stuff like 20W-50 and 25W-60 here. It's unheard of over there. These days the factory grades for most Chevs, Fords, Honda's, Mazda's and Toyota's sold in North America is 5W-20 !, has been for a few years now and there is absolutely no evidence of premature engine failures or excessive wear compared to engines in the past running 10W-30, and the Yanks tend to keep vehicles like we do here.

Think of it this way, no one that runs a huge truck uses anything heavier than a 15W-40 in the hottest of summers here as they protect fine, and if the cooling system is doing it's job, the oil doesn't get too hot.

Put it another way, Valvoline make some good oils, their full on diesel oils are developed in conjunction with Cummins, but those three Castrol oils are all much better oils than 20W-50 XLD