Oil

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fett

fett

Well-Known Member
Posts
8,637
Location
South Hampshire
1990 3.9 classic v8,by no means brend new!

I normally get the 10w40 magnatec for petrol engines, semi synthetic which she likes alot. I do alot of short trips you see.

The suppliers I use cant get the one for petrol engines at the moment but they have the 10w40 magnatec for Diesel engines, would that do my petrol engine any harm?

It looks a bit like a Diesel in there anyway as the previous owner was not too keen to change the oil very often and I have done it 4 times in the last 8 months to try and clean it out :doh: lol
 
I`ll stand correction on this but, diesel oils are higher detergent oils, so could, on an older engine clean it out a bit "too much"? possibly cleaning out some of the gum and varnish that prevents the worn, greater than brand new tolerances, seeping oil past the rings and seals? I have no proof of this, but guess a good petrol oil will be less of a risk. I don`t think anything would go bang if you did use diesel oil, and do accept that magnatec is a very good quality oil but better petrol non-magnatec than diesel magnatec, maybe.
 
Yeah they said they were out of stock as the were combining it into a petrol and diesel oil, but I could do with it now!

My other plan was to buy some of that really cheap asda or tesco stuff that was £5 for 5 litres and run it on that for a few weeks to flush it out a bit more then change to the new expensive stuff in but guess what they have stopped selling it at the supermarkets :doh:

I have put 8 cans of magantec through it in 8 months (2 per change) and cleaned out the sump and rocker covers , getting expensive lol Feckin useless lazy owners not keeping up with its changes!
 
If they`re marketing it as dual-purpose petrol/diesel oil I`d bet it`s gonna be high detergent diesel oil in a can labeled for dual use: A petrol standard oil ain`t up to spec for a diesel. I don`t think any damage would be done to a new engine run with it, but it could dislodge crud in an older engine, couldn`t it? Although that might seem good at first, maybe in a high-miler that crud is masking wear on oil control rings; cleaner rings=more chance of blow-by, =problems?
 
When you say she likes her oil alot do you mean lots to top up with between changes? A 20w-50 would reduce your oil consumption, but as you`re doing a lot of short runs, so presumably not getting really warmed up for long, there would be increased wear on the engine, so not a good option. But then again the increased wear only likely to show years down the line.... Maybe the tin -worm will have gotten it`s teeth in before it shows? Not an exact science, running temps, gentle or hard use, warming an engine up before giving it full right boot all make a bigger difference than choice between different `reputable` brands I reckon.
 
she doesnt use any round town but a bit on a long hard motorway run. I agree with your points I asked the guys at the oild supplier here is what he said

"It is in the process of coming out, we are awaiting stock from Castrol and they are running a little behind. All oils these days are for both petrol and diesel despite the marketing on the can. You can tell this by the API or ACEA specs on the can. ACEA A# is for petrol and ACEA B# is for diesel.

The Castrol petrol and diesel magnatec are indeed the same oil in a different tub, the new product is just a new label in reality. They have done this to try and eliminate all of the confusion."

So I dont really know what to do now , can I trust all that?
 
fett said:
she doesnt use any round town but a bit on a long hard motorway run. I agree with your points I asked the guys at the oild supplier here is what he said

"It is in the process of coming out, we are awaiting stock from Castrol and they are running a little behind. All oils these days are for both petrol and diesel despite the marketing on the can. You can tell this by the API or ACEA specs on the can. ACEA A# is for petrol and ACEA B# is for diesel.

The Castrol petrol and diesel magnatec are indeed the same oil in a different tub, the new product is just a new label in reality. They have done this to try and eliminate all of the confusion."

So I dont really know what to do now , can I trust all that?
Click to expand...


Fett,

Out of interest I just went over to the Castrol web portal I could not find anything that says Magnatec Diesel can be used in Petrol engines

However I found this about the Edge diesel Oil

Q. My BMW needs Longlife 04 specification and I see this on EDGE Turbo Diesel 0W-30 – The name says “Turbo Diesel” - can this be used in petrol engines

A. If you have a requirement for BMW Longlife 04 specification in a petrol engined car, you can happily use any of the EDGE products that meet BMW LL04 - ie EDGE Turbo Diesel 0W-30, EDGE 5W-30, EDGE Sport 0W-40 or EDGE Turbo Diesel 5W-40.
With regard to the EDGE Turbo Diesel 0W-30, you can use this in a petrol engine – as this meets the Longlife 04 specification which covers petrol and diesel engines.
Click to expand...


So I would guess the answer your looking for is ...YES!!!..............................But read further below................




Keith
 
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I also found this on a US web site forum ....

Well, you can use a diesel approved lubricant in any gasoline engine, but not the other way around. The big differences between the two are viscosity range (usually diesel oil is a straight 30 weight, or a 15w40, or 10w30), levels of additives for engine protection (diesel oils are usually higher), and TBN levels (again, higher for diesel, as to combat soot levels from the combustion process).

The big reason that most in the US usually don't use a diesel oil in a gasoline engine is catalytic converter poisoning from any oil consumption issues. ZDDP, which is usually in high levels in a diesel rated oil, can build up in a cat, and cause premature failure of the part. Mind you, this only comes into play if oil consumption is an issue. I've been using a motorcycle racing oil in my car, that has levels of ZDDP through the roof, but I have no consumption, so I'm not too worried about failure of an emission systems part.

Longer drain intervals are both a personal choice AND a system backed up through oil analysis of the oil in the crankcase after so many miles or kilometers. You can usually leave in diesel oils longer, as they are designed by nature to last longer, but I wouldn't also blindly say that I would leave it in the crankcase for say, 15K miles, without doing an analysis, to be sure that the lubricant is still doing it's job, or if the additive package is spent.
Click to expand...



Mmmmmmm!!!!!!!!.................. Interesting eh????
 
A bit more digging revealed this on the Castrol NZ web portal..

Can you use gasoline engine oil in a diesel car and vice-versa?


Because gasoline engines and diesel engines run on different fuel, they have different characteristics and therefore the performance requirements of engine oils must also vary accordingly.

Dispersion cleaning properties (washing out residual particles such as sludge to keep the engine interior clean) and anti-wear protection for the camshaft are especially important in gasoline engine oil. Furthermore, gasoline engines are equipped with catalysers to purify exhaust fumes and an oil formulation that prevents adverse effects to these is essential. Diesel engines, on the other hand, produce more soot and so an ability to control the soot build-up is crucial. Also important are antacid properties to neutralise the acidic particles that are produced by the combustion of sulphur present in diesel fuel. As particular emissions are more controlled vehicle manufacturers are designing engines with emissions equipment that requires high performance oil.

Consequently, it is not advisable to use gasoline engine oil in a diesel engine, or diesel engine oil in a gasoline engine. The SL, SJ, etc. performance ratings of gasoline engine oil all begin with the letter 'S' (Spark ignition), and the CF, CD, and so on of diesel engine oils with 'C' (Compression ignition), so it is quite easy to tell them apart. [Gasoline/Diesel dual use] engine oils that carry the rating [SL/CF] have been specifically formulated for both types of engines and can be used in either, according to conditions of use.
Click to expand...



Yet MORE MOOCHIN about revealed this from the HALFORDS web site.............
Additional Information Castrol Magnatec 5W-30

* SAE 5W-30
* ACEA A1/B1
* API SL/CF
* ILSAC GF-3
* Meets the requirement of Ford WSS-M2C913-B
Click to expand...

So That means YES you can use it in either Diesel or Petrol engines!!!!

Fett, I really enjoyed doin that bit of research, thanks for the opportunity...


Keith
 
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Thanks claw I am glad you did it too!

I am going to have a look at the S and the C later today and see if they were telling the truth.

I probably need some dirt in there to keep my seals working but as it was so dirty when I got it I am guessing that at least one does of diesel oil wont hurt it too much.

Wammers I agree but I have ended up chnging it every 700 miles or so , so far so I can get any more frequent than that lol.

Shame that asda stuff has gone as that would have been perfect for a clean out but the cheapest I could find was £15 for a can and I am paying £22 for magnatec so thers not much in it anymore!
 
fett said:
Thanks claw I am glad you did it too!

I am going to have a look at the S and the C later today and see if they were telling the truth.

I probably need some dirt in there to keep my seals working but as it was so dirty when I got it I am guessing that at least one does of diesel oil wont hurt it too much.

Wammers I agree but I have ended up chnging it every 700 miles or so , so far so I can get any more frequent than that lol.

Shame that asda stuff has gone as that would have been perfect for a clean out but the cheapest I could find was £15 for a can and I am paying £22 for magnatec so thers not much in it anymore!
Click to expand...

I get good quality (ticks all the spec box's) mineral oil for around £9.00 a gallon from the motor factors. So for about £18.00 + filter a time, you can change your oil twice a year, and have a bit for top up for the price of a gallon of fully synthetic oil. That type of oil is not required unless you run a high performance, high stress engine. High performance, high stress are not words you could use to describe a Rover V8. It of course will not do any harm, but really is not required. Unless spending money for the sake of seeing what colour semi or full synthetic goes when your head gasket blows floats your boat.
 
It's well known that a good quality mineral oil such as Valvoline is the ideal oil for the V8. There is no advantage in using semi/fully synthetic oils in what is mechanically an old design. Far better to use a mineral oil and carry out regular oil & filter changes..every 3000 miles if needs be in order to prevent sludging and contamination.
The killer is short runs where the engine does not get up to, and maintain it's working temperature in order to evaporate and get rid of water vapours and condensate which causes sludge to form.
 
Yeah and thats what I do , alot of short runs. Thats why I like the magnatec , if you could get non semi synth magnatec I would use that.

they say"are for both petrol and diesel despite the marketing on the can. You can tell this by the API or ACEA specs on the can. ACEA A# is for petrol and ACEA B# is for diesel. "

And the spec is "ACEA A3/B3

API CF

MB 229.1

VW 505 00



So we are thinking some diesel oil wont hurt it?

Consensus please!
 
Any oil that will meet the spec of your car will do. Cheap does not mean rubbish. Just remember castrol pays huge advertising and the bottom line is you pay in the final price.
I run my cars on semi 10 40 from texaco. Its £15 cheaper in morrisons than magnatec. Just change it more often if your unsure. Just a quicky re magnatec. A few years ago tesco did a boo boo on it and were selling for £3. i went round all the stores and purchased as much as it as possible. Took them a week to sort it out but i had a few years of oil for next to nowt.
 
the hooded claw said:
A bit more digging revealed this on the Castrol NZ web portal..





Yet MORE MOOCHIN about revealed this from the HALFORDS web site.............

So That means YES you can use it in either Diesel or Petrol engines!!!!

Fett, I really enjoyed doin that bit of research, thanks for the opportunity...


Keith
Click to expand...

hi keith,the oil you mention is for cars that have a DPfilter,as it burns with less ash therefore will run a lot cleaner as well.i had to research this oil for my noooish mondeo cdti.opie oils have got a great deal on this spec of oil as i have just bought ten litres from them.:D
 
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