Tesco diesel oil bargain

[Bav32]

Whilst strolling through my local Tesco came across their own brand of 15w/40 diesel straight mineral oil on Clearance.
Had been £20 for 4 litres, reduced to £16. now clearing at £8 per 4 litres.
Bought the stock.
No reason to think this might not be at the same price in other stores. Good hunting.

 

[CAPTAIN FANTASTIC]

Also, the Tesco fully synthetic oil is £18, which is ideal for my elderly md11c

 

[jwilson]

Also, the Tesco fully synthetic oil is £18, which is ideal for my elderly md11c

I always thought synthetic was all wrong for an old very low-tech engine.

 

[Bav32]

Agree. Always thought that synthetic oils were not suitable for older normally aspirated engines.
I've also noticed it increasingly difficult to get straight mineral oil, and the price seems to be rising a lot.

 

[chewi]

I always thought synthetic was all wrong for an old very low-tech engine.

+1.

 

[bedouin]

Also, the Tesco fully synthetic oil is £18, which is ideal for my elderly md11c

My MDIIB really doesn't like these modern high-tech oils. Only works on the most basic (not multigrade).

These days that is a lot more expensive than synthetic

 

[vyv_cox]

I always thought synthetic was all wrong for an old very low-tech engine.

Synthetic lubricants were developed for one particular reason - to prevent coking due to cracking of long and short chain hydrocarbon molecules at high temperatures. Modern high speed, long distance motoring, especially on motorways, was very hard on mineral oils. Synthetics are hydrocarbons with molecules of very similar lengths, so they don't crack at high temperatures. Using them in raw-water cooled engines that rarely get above about 70C is not only pointless but it can cause all sorts of problems, as the additives are not designed to function at such low temperatures. Look at any classic car website and you will find all sorts of horror stories of old engines that failed when synthetics were used in them.

 

[nigelmercier]

Whilst strolling through my local Tesco came across their own brand of 15w/40 diesel straight mineral oil on Clearance...

Is it this stuff?

http://www.tesco.com/groceries/product/details/?id=252431228

If not, any chance you could you post a picture; I need to show my wife what to buy.

 

[CAPTAIN FANTASTIC]

I always thought synthetic was all wrong for an old very low-tech engine.

I am very aware that many people object to the idea of using synthetic oils on old engines where the tolerances and metallurgy is different to current engines, however, in my opinion, synthetic oils are far superior in that the molecules, although smaller, do not break down as result to temperature or duration. I do not suggest that others should use synthetic oil too; but this is what I have done for many years.

 

[pvb]

I am very aware that many people object to the idea of using synthetic oils on old engines where the tolerances and metallurgy is different to current engines, however, in my opinion, synthetic oils are far superior in that the molecules, although smaller, do not break down as result to temperature or duration. I do not suggest that others should use synthetic oil too; but this is what I have done for many years.

I used to use synthetic oil in my old boat, with a 1990 Volvo Penta 2003T, primarily because it had a turbo. No problems at all.

 

[Hydrozoan]

Thanks for the heads-up, but my local Tesco doesn't do automotive products.

Please excuse a continuation of the drift, but I have always avoided synthetic or semi-synthetic and used Halford's ('enhanced mineral'?) diesel oil - the one in the black container at about £20/5l. But I cannot now find it on their website - does anyone know if it's been discontinued?

The nearest thing on the site is a 15W40 mineral petrol and diesel oil in a blue container, said to be suitable for cars of the mid-80s to early 90s, at about the same price. It's specified ACEA A3/B3 and API SL CF CF-4, but I haven't any of my usual one at home, so will have to check its specifications - and those of the engine - when next on the boat.

 

[sailorman]

API SL CF CF-4,

is the important bit

 

[Hydrozoan]

API SL CF CF-4, is the important bit

Thanks - yes, and I suspect it will be OK but the previous one was specifically for diesel, and the current one in a black container is a 5W40 fully synthetic turbo diesel oil. Just made me wonder - with the Tesco clearance - if straight mineral oils are disappearing from major stores.

 

[sailorman]

Thanks - yes, and I suspect it will be OK but the previous one was specifically for diesel, and the current one in a black container is a 5W40 fully synthetic turbo diesel oil. Just made me wonder - with the Tesco clearance - if straight mineral oils are disappearing from major stores.

Diesel - Petrol is all marketing hype. go by the spec "C" = compression ignition

 

[Hydrozoan]

Diesel - Petrol is all marketing hype. go by the spec "C" = compression ignition

Thanks.

 

[VicMallows]

Is it this stuff?

http://www.tesco.com/groceries/product/details/?id=252431228

If not, any chance you could you post a picture; I need to show my wife what to buy.

Curiously that looks exactly like the stuff I bought a stock of at TESCO 4 years ago. It seems to appear on the shelves around this time every year, always labeled as 'suitable for older diesel cars'.

Edit: Correction. The stuff I bought was as pictured by Bav32 a few posts down.

 

[vyv_cox]

Diesel - Petrol is all marketing hype. go by the spec "C" = compression ignition

Strange way of looking at it. SL is the specification for petrol engines, 'S' = spark ignition. Simple oils such as these can qualify for both types of engine.

 

[sailorman]

Strange way of looking at it. SL is the specification for petrol engines, 'S' = spark ignition. Simple oils such as these can qualify for both types of engine.

I assumed the #15 was interested in diesel oils

 

[Hydrozoan]

I assumed the #15 was interested in diesel oils

Correct - see #11.

 

[Bav32]

Having problems attaching photo but it is a black plastic container, label reads;
Tesco
Diesel
mineral motor oil 15w/ 40
suitable for older diesel engines