Is this the right sort of oil?

Colvic Watson

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1970's Thornycroft 230, just changing the oil and was looking for 15/40 but came across this in Halfords:

View attachment 52526

http://www.halfords.com/motoring-travel/engine-oils-fluids/engine-oil/halfords-classic-oil-20w50-5l

It says for older engines but is it suitable for diesels rather than just petrols - also apparently it's low detergent if that's a good thing or not? We don't use oil at all - rarely top up a drop in a season and have very good compression and oil pressure. So I'm wary of using an oil designed for engines that do have those problems. Or am I over thinking this? Again :eek:
 

FullCircle

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Simon, I suggest a mineral 15w/40 to CF spec - Wilko supermarkets sell it, but you can get a Halfords version - save a fiver!
 

Hazymoonshine

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I bought some Halfords 15W40 Mineral for my engine last week. They only appear to have 2l available online, but there was plenty available as 5l in store. £19, I think it was. I used it in my Thornycroft T80 and now Yanmar.
 

VicS

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1970's Thornycroft 230, just changing the oil and was looking for 15/40 but came across this in Halfords:




http://www.halfords.com/motoring-travel/engine-oils-fluids/engine-oil/halfords-classic-oil-20w50-5l

It says for older engines but is it suitable for diesels rather than just petrols - also apparently it's low detergent if that's a good thing or not? We don't use oil at all - rarely top up a drop in a season and have very good compression and oil pressure. So I'm wary of using an oil designed for engines that do have those problems. Or am I over thinking this? Again :eek:

Well see the specification on Halfords website http://www.halfords.com/motoring-travel/engine-oils-fluids/engine-oil/halfords-classic-oil-20w50-5l?_$ja=kw:skimlinks_phg|tsid:40392&cm_mmc=Affiliates-_-PerformanceHorizon-_-skimlinks_phg-_-TopLink

its a 20W/50 oil which means thats its higher viscosity grade than specified for your engine

It does have an API CC rating , which is an obsoelte diesel engine rating suitable for engines pre 1990

Halfords say No not suitable for diesel engines

I'd say no dont use it , unless your engine is very worn. Its the wrong viscosity

No dont use it because Halfords say its not suitable for diesel engines. Even though it has an API CC rating


ITYWF Halfords do a 15W40 mineral diesel engine oil
 
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JerryHawkins

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4 Sep 2001
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Plymouth
1970's Thornycroft 230, just changing the oil and was looking for 15/40 but came across this in Halfords:

View attachment 52526

http://www.halfords.com/motoring-travel/engine-oils-fluids/engine-oil/halfords-classic-oil-20w50-5l

It says for older engines but is it suitable for diesels rather than just petrols - also apparently it's low detergent if that's a good thing or not? We don't use oil at all - rarely top up a drop in a season and have very good compression and oil pressure. So I'm wary of using an oil designed for engines that do have those problems. Or am I over thinking this? Again :eek:

I use 20w50 in our Thorny 345. This year, I've used 'Golden Film' from here http://www.classic-oils.net/Morris-Golden-Film-20W50
 

Avocet

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Slight thread drift, but it just struck me how often we see these threads about oils, and obsolete specifications, and owners wanting to do the right thing for their old engines. Does this mean there's a significant un-tapped market out there for oil retailers? Chandlers seem to sell all manner of obscure things that I'd have thought not enough people would want, yet they don't seem to stock engine oils for older boat engines?
 

theoldsalt

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......It does have an API CC rating , which is an obsoelte diesel engine rating suitable for engines pre 1990

Halfords say No not suitable for diesel engines

No dont use it because Halfords say its not suitable for diesel engines. Even though it has an API CC ratingl

Rubbish ! "CC" means suitable for Compression ignition engines ie DIESELS.

BTW "SF" means suitable for Spark ignition engines ie PETROL

I have been using "CC" oil in my Thornycroft T80 for 10 years from B&Q http://www.diy.com/departments/carlube-daytona-20w50-type-engine-oil-45l/259321_BQ.prd
 
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lw395

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Slight thread drift, but it just struck me how often we see these threads about oils, and obsolete specifications, and owners wanting to do the right thing for their old engines. Does this mean there's a significant un-tapped market out there for oil retailers? Chandlers seem to sell all manner of obscure things that I'd have thought not enough people would want, yet they don't seem to stock engine oils for older boat engines?
There are a few specialist retailers/sources of which Morris Oils are the one I'd first think of.
The vintage car and bike world caters for a lot of stuff older than most MAB engines.
It's not like oil is something you need suddenly in an unplanned way, hopefully we all know we are going to be changing the oil every season?
 

theoldsalt

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There are a few specialist retailers/sources of which Morris Oils are the one I'd first think of.
The vintage car and bike world caters for a lot of stuff older than most MAB engines.

I've stated it before and I'm stating it again. If you need API CC then B&Q stock it. So hardly more available and convenient. So buy it !
 

lw395

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I've stated it before and I'm stating it again. If you need API CC then B&Q stock it. So hardly more available and convenient. So buy it !
The cheap stuff from B&Q might scrape through API CC, but it may not be as good as a 'proper' brand.
It's probably recycled from what we take to the dump.

You put what you like in your engine, just don't expect me to buy the engine afterwards....
Oil is a subject like religion, best not to tell others what to do...
 

theoldsalt

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The cheap stuff from B&Q might scrape through API CC, but it may not be as good as a 'proper' brand.
It's probably recycled from what we take to the dump.

You put what you like in your engine, just don't expect me to buy the engine afterwards....
Oil is a subject like religion, best not to tell others what to do...

If it meeets the spec, it's OK. Buy a "proper" brand and you just pay for the name. If your philosophy is correct we should never buy ASDA, TESCO or SAINSBURY petrol but only ESSO, BP or SHELL. I'm not trying to "tell" people what to buy just pointing out how to save money and buy conveniently instead of mail order.
Like petrol (for example) most oil comes from just a few sources - its just labelled differently.
The same applies to the food you probably buy at your supermarket. We all tend towards cheaper lesser known brands (incl supermarket own) rather than the more expensive traditional ones.
 

VicS

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Rubbish ! "CC" means suitable for Compression ignition engines ie DIESELS.

BTW "SF" means suitable for Spark ignition engines ie PETROL

I have been using "CC" oil in my Thornycroft T80 for 10 years from B&Q http://www.diy.com/departments/carlube-daytona-20w50-type-engine-oil-45l/259321_BQ.prd

Yes I Know. that diesl engines are copression ignition and that gasoline engines are spark ignition. I am also aware of the API ratings for Spark ignition engines

I said, as you have quoted, "It does have an API CC rating , which is an obsoelte DIESEL engine rating"

I was making the pont that although it has a Diesel engine rating Halfords say it is not suitable for diesl engines.
 

theoldsalt

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I said, as you have quoted, "It does have an API CC rating , which is an obsoelte DIESEL engine rating"

I was making the pont that although it has a Diesel engine rating Halfords say it is not suitable for diesl engines.

API CC was not obsolete when my engine was manufactured so if it was good enough then, it is good enough now. My engine requires nothing more recent.
My doubt about the Halfords recommendation is how well informed/qualified was that advise.
As I stated, if the Spec is API CC the oil is suitable for diesels.

If Halfords are selling oil specified as API CC that is actually not suitable for diesels then they are guilty of misrepresentation. The API CC spec should be removed from the labelling.

I know i digress but it's as insane as an occasion when I went into a paint shop to buy "Yacht Varnish" only to read on the tin label "not suitable to marine use". Is the world going mad !!
 
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