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Castrol GTX 10W/40 & 15W/40 - 4 Litres - £10 *Instore* @ Asda
Castrol GTX 10W/40 & 15W/40 - 4 Litres - £10 *Instore* @ Asda

Castrol GTX 10W/40 & 15W/40 - 4 Litres - £10 *Instore* @ Asda

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Saw in Asda yesterday after shopping around for a good deal on oil.

Half price reduced from £20 to £10

4 Litres Castrol GTX 10W/40 and Castrol GTX 15W/40

24 Comments

Original Poster

http://i19.photobucket.com/albums/b198/ironeagleuk/Hot%20UK%20Deals%20pics/IMAG0091.jpg

http://i19.photobucket.com/albums/b198/ironeagleuk/Hot%20UK%20Deals%20pics/IMAG0090.jpg

Great price for a 4ltr of quality oil! heat added

Sorry if this is a daft/simple question, but I don't know that much about engine oils, what is the best one to go for 10W/40W or 15W/40W, what's the difference? BTW it's not a new car, now 9 yrs old, 2.0l if that makes any difference.

Original Poster

HAL2000

Sorry if this is a daft/simple question, but I don't know that much about … Sorry if this is a daft/simple question, but I don't know that much about engine oils, what is the best one to go for 10W/40W or 15W/40W, what's the difference? BTW it's not a new car, now 9 yrs old, 2.0l if that makes any difference.



You need to find out the specs of your engine really.....the Halfords site has a oil finder here: halfords.com/web…_-1

, as does the Castrol site here: http://www.castrol.com/castrol/iframe.do?categoryId=9024084&contentId=7044829

Having said that the original specs for my car say 10/W40, yet Castrol reccommend 0W/30 Castrol Edge, or Magnatec 5W/30....I guess the quality has changed over the years
Edited by: "ironeagleuk" 6th Mar 2011

Why is that they now sell oil in 4L containers, were most cars take 4.5L of oil, is this to make you buy 2.

oberlisc

Why is that they now sell oil in 4L containers, were most cars take 4.5L … Why is that they now sell oil in 4L containers, were most cars take 4.5L of oil, is this to make you buy 2.



Because it used to be 1 Imperial Gallon would equal 4.54609188, however since we are metric and things have to be sold in metric measurements it is now four litres.

Bargain shame I can never find motor oil in Asda, even the larger ones

Even so very hot

Do different brands of oil affect a car? E.g. Mine is apparently recommended to take 5W/something with Castral but I filled up last two times with 10W/40 and is working very very very well.
Edited by: "hanif248" 6th Mar 2011

Banned

hanif248

Do different brands of oil affect a car? E.g. Mine is apparently … Do different brands of oil affect a car? E.g. Mine is apparently recommended to take 5W/something with Castral but I filled up last two times with 10W/40 and is working very very very well.



Read your manual or use the links posted above to get the recommended specification.

For my car, the maker Citroen recommend some stupidly expensive Total branded oil. Castrol recommend their expensive Castrol Edge product. If you read the Citroen manual or the Castrol website, you find that the cheaper Castrol Magnatec 10W/40 (or in fact any semi-synthetic 10W/40 meeting the API SL spec.) would do.

Don't worry about the brand. Learn how to read the specification label that appears on the back of most motor oils and match it to the requirement of your vehicle.

Banned

was only last month they brought it in after never selling it for £10 , now bump the price up and reduce it , always the ASDA way

Was instore @ Weston Super Mare at this price, also 1 Litre bottles at £3. Both 10w 40 & 15w 40

yellowplum

Because it used to be 1 Imperial Gallon would equal 4.54609188, however … Because it used to be 1 Imperial Gallon would equal 4.54609188, however since we are metric and things have to be sold in metric measurements it is now four litres.



4.5 litres is a metric measurement?

yellowplum

Because it used to be 1 Imperial Gallon would equal 4.54609188, however … Because it used to be 1 Imperial Gallon would equal 4.54609188, however since we are metric and things have to be sold in metric measurements it is now four litres.




And there was me thinking it was because it's a back-handed way of increasing the price.

Don't put 10w 40 in modern ford zetec engines or you will find it struggles to start in winter. They need 5w 30.

Even at the inflated price of oils these days there is no cheaper way to make your engine last longer than regular oil and filter changes (more often than manufacturer recommends if possible) with the correct oil. Manufacturers are under competitive pressure to extend service intervals and modern synthetic/semi synthetic oils allow them to do this but they tend to stretch things to the limit so if you plan to keep your car a while consider an intermediate oil change.

Putting the wrong spec in your car is unlikely to cause instant damage but really isn't a very clever thing to do. Modern engines are very sophisticated and work to very fine tolerances. A few more pounds spent on oil is way cheaper than major damage to your engine. If you don't know what oil your car needs don't guess, look it up! The grade is only part of the story - many engines need oil which meets their manufacturer's specs too (though the brand is irrelevant provided it really is an equivalent).

Edited by: "Besford" 6th Mar 2011

Original Poster

Interestingly I went into my local Folkestone Asda, and this oil was listed on the shelf at £20....whether it's reduced at the till or not, I don't know.

The deal I saw and posted was at the Greenhithe branch

What is the difference between 10w40 part synthetic for cars and the same stuff that I put in my motorbike, just out of interest?

Cheers

ironeagleuk

You need to find out the specs of your engine really.....the Halfords … You need to find out the specs of your engine really.....the Halfords site has a oil finder here:http://www.halfords.com/webapp/wcs/stores/servlet/categorydisplay_storeId_10001_catalogId_10151_categoryId_165581_langId_-1 , as does the Castrol site here:http://www.castrol.com/castrol/iframe.do?categoryId=9024084&contentId=7044829Having said that the original specs for my car say 10/W40, yet Castrol reccommend 0W/30 Castrol Edge, or Magnatec 5W/30....I guess the quality has changed over the years



Checked the Castrol site, and like yours it ideally suggested the 0W/30W Castrol Edge, but below that was the 10W/40W Magnatec, so looks like I should take up this deal, and luckily Castrol say my engines oil capacity is 4L. Cheers for the post and your help OP!

Banned

HAL2000

Checked the Castrol site, and like yours it ideally suggested the 0W/30W … Checked the Castrol site, and like yours it ideally suggested the 0W/30W Castrol Edge, but below that was the 10W/40W Magnatec, so looks like I should take up this deal, and luckily Castrol say my engines oil capacity is 4L. Cheers for the post and your help OP!



Note, the oil on offer is GTX. The Castrol Magnatec is a different, more expensive product.
Edited by: "wessie" 7th Mar 2011

Banned

dangermoose5

What is the difference between 10w40 part synthetic for cars and the same … What is the difference between 10w40 part synthetic for cars and the same stuff that I put in my motorbike, just out of interest?Cheers



Oils labelled for motorcycle use will meet the Japanese spec. JASO MA. This is an oil approved for use in vehicles with a wet clutch i.e. a clutch lubricated by the engine oil.

Car oils may cause clutch slip in some motorcycles as these oils contain friction modifiers which allegedly contaminate the clutch plates. Motorcycle oils are sold in lower volume than car oils and therefore are usually more expensive.

If you have a motorcycle with a dry clutch then you can use an oil designed for use in car engines as long as it meets the other requirements. At least three European manufacturers make bikes with dry clutches: BMW, Moto Guzzi & Ducati. I have a BMW R1150GS and use Castrol Magnatec 10W/40 which is conveniently the same oil that suits my car.

dangermoose5

What is the difference between 10w40 part synthetic for cars and the same … What is the difference between 10w40 part synthetic for cars and the same stuff that I put in my motorbike, just out of interest?Cheers



One possible difference is that your m'bike probably has a wet clutch (ie bathed in oil) and car oils contain additives which can make it slip).

wessie

Note, the oil on offer is GTX. The Castrol Magnatec is a different, more … Note, the oil on offer is GTX. The Castrol Magnatec is a different, more expensive product.



The Magnatec scanned at £10 too for 10w-40 so bought that instead of the GTX one
The Edge one scanned at £30 so left that one alone. Hope that helps.

thanks for info

twe

The Magnatec scanned at £10 too for 10w-40 so bought that instead of the … The Magnatec scanned at £10 too for 10w-40 so bought that instead of the GTX one 8)The Edge one scanned at £30 so left that one alone. Hope that helps.

Hi. what a diference is between castrol gtx 10w40 - castrol magnatec 10w40?

Castrol gtx 10w40 is a mineral oil - oil from the ground, processed and with additives, such as detergents and octane boosters. Castrol magnatec 10w40 is a semi synthetic oil - oil from the ground, processed and with additives, plus synthetic oil molecules designed to maintain their properties under heat and pressure. Synthetic and semi synthetic oil generally holds their properties better (last longer, better quality) than straight mineral oil. However, note that some classic cars (pre-1980's) don't get on well with synthetic or semi synthetic oils.
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