Castrol Magnatec 10W-40

I highly recommend this oil! – I bought my 2005 corolla wagon in 2009 when it was 4 years old and done 117,000 km. I've used Castrol Magnatec 10W40 in my car the whole time and it's now 2022 and the car has done 345,000 but still runs as good as the day I got it! It has had no loss of power and it's fuel economy is still as good as ever! I religiously change my oil every 3… Read more

months or 5,000km as it states on the bottle, I also change the oil filter at the same time. I can use the more expensive Castrol Edge 5W30 and leave it oil changes for every 10,000kms but I still prefer to use the cheaper Magnatec and change the oil more often as I feel it is better for the car.

318000 miles and 14 years on this oil, no issues – Have been using this oil in my 1.4 4d 2005 Toyota Corolla for 14 years, put on 318,000 miles hardly burns any oil, engine quiet, engine never been apart, change every 5-6 thousand miles, very very good oil.

10W 40 Magnatec Oil – I have used this oil in most of my cars for many years, Castrol Magnatec 10W-40 . NZ conditions maybe a little cooler than Oz. I have never had any issues, all my cars engines have run without fault. Recommend you wait for it to come up on special. Show details

Excellent balance of oil protection/price – Over 150,000km keeps engine internals clean not 100% like synthetic would as there is a light oil lacquer in hot areas. Can live with more frequent oil changes vs straight synthetic and minimal expense as my preference. Works well and helps with cold piston slap than dealer oil I can hear a difference as time to quite is noticeably faster. Show details

oil is like horses for courses – my 2000 magna tj has done 275 kms so far i bought it with 80,000 kms and i think the magnatec oil is best suited for it.I once went 15,000ks without a service and the engine never skipped a beat the oil was very dark but not black,so i think the magnetic molecules does really work. Show details

Rattle in the rockers – I have used magnatec for 20 years on my turbo cars and was very brand loyal as my cars never went wrong. I recently made up a 185kW turbo charged MX5 and it always had a rattle in the rockers until it built up oil pressure on start-up. I changed oil to old faithful magnatec and the rattle remained so next time round I thought I would push the boat… Read more

out and go for a nulon full synthetic 10w-40 and hey presto no more rattle...... ever. I will now be recommending Nulon synthetic going forward and have also change my partners subaru oil to nulon. I have now flogged off any magnatec I had in the garage for $1 on trademe (NZ version of ebay).

Absolutely rubbish oil – Made the mistake of using this oil some years ago, even though I was warned it's pure junk. Ran over summer for less than 5000 km in a Buick 3800 V6, when oil was drained you could observe it had sheared down to nothing. It basically wasn't protecting anything anymore and looked like had done more like 25000km. I wanted to find out why this oil… Read more

was so bad and how it got this reputation and I found out it's mostly straight mineral oil with about 2% ester added in (that's where the "intelligent molecule" and "clings to surfaces" marketing jargon comes from). They also label this mixture "part synthetic".

Mineral oil was just passable in a thick 50 weight (old skool 20w-50), drop it down to 40 and it shears too quickly. Modern oil nowadays depends on a good full synthetic base stock, not cheap mineral, and also a strong additive package. This oil has neither and wouldn't be fit for a lawnmower.

However, Castrol knows how to make excellent oils, they are the Magnatec Professional series and NOT sold in retail stores, only to workshops.

Good value and quality oil – Are there better oils out there? Definitely and you pay accordingly. This product isn’t for you if you run a highly strung engine, go racing or require manufacturer specific oils. This product is intended for the average motorist. I’m a car enthusiast myself and like keep my vehicles in top shape and like to get the best value (I’m not talking… Read more

cheap and nasty).

I came across the product due to the regular deals at auto stores for 10w-40 and I wanted to standardise motor oil for all the family’s vehicles (family has 10 cars between us) - means less inventory and therefore less cost.

Been running this oil for many years with no issues - never used oil additives. Just oil and oil filter changes.

You no longer need oil additives - this oil will keep your engine very clean - if you have an engine with some light sludging - simply running this oil for the recommended interval along with oil filter you will instantly notice the inside of the engine getting cleaner.

Most of my driving is heavy urban and short distance freeway - which is very punishing for any oils due to fuel enrichment and carbon.

Pros: - keeps the engine super clean (actually observing inside the cam cover and looking at the cams) - great anti-sludge control for engines prone to sludge, due to strict emission controls. - noticeably smoother operation - excellent thermal stability, observation from oil temp gauge. - value for money when on sale

Cons (nothing, but if I had to nit pick): - tricky marketing can confuse people - causes exhaust to be stinky on cold mornings, observation compared to other oils.

Solved a deep-seated problem – Although our pre-loved Skoda Octavia came with a bundle of proof-of-service dockets the car was a total disaster gulping a litre of oil every 450ks accompanied by much smoke. Our mechanic took out the plugs and they were scarcely usable. The diagnosis was that the previous owner had run the car on lowest grade ethanol and supermarket oil. We… Read more

ignored Skoda's recommended oil grade (too late for that anyway) and filled up with Magnatec 10W-40. Three tankfuls of 98 octane petrol and a set of new plugs later and we never knew anything was wrong. Been using Magnatec ever since.

Perfect, Genuine – I have found a genuine oil after a long time. Car is very smooth and temperature of oil is 4-5 degree celcius lower than before. Car mileage is 192k and its 530i bmw. I have not seen any better oil than this is my career of over 20 years till date. Its liquid engineering.  Show details

Synonym for no quality – Horror. The oil thickens for unknown reasons and chokes the engine. Like a glue. I have never seen so much sludge in the car, although I was forced to change it at 2-3k km because I start losing it for some reason. Fuel economy is nonexistent with it. My mechanic recommended it to me and I used it in three petrol cars (my friend used it also, and… Read more

had the same problems on diesel). When I took over the repair of the car in my hands, I used many oils and I never had such problems. I honestly would not recommend it to anyone.

Quality oil – I have always use this oil for many years and am pleased with the manufacturer's claims. My cars have run exceptionally well with using this oil. I try to purchase a few cans of this oil when it is on specials. The service intervals of my cars are usually 5000 to 7000 kms.  Show details

Do the job – Used this oil for toyota echo and i replaced this oil every 6000 ks and found this oil do the job, so i recommended this oil from now and i bought this oil castrol 10w40 when it can be half price at auto stores and thanks to magnatec technology .  Show details

Great product – You can feel the different after the change. Really recommended for other users. Save me almost half $ on a synthetic oil when there is offer. But this product will slip thru the oil pan (old car). Not a main issue for me, just need to top up for the first month and gone later.  Show details

Must buy item whenever they on special! – regularly i checked with supercheapauto catalog, often see some castrol oil on good deals. However only castrol magnatec catch my eyes everytime. Not only because the price can often reduced from $45 down to $23 for 5L, its also the performance and quality from Castrol that fulfilled my car's need. Its great to always enjoy the smoothness from… Read more

a running engine. Magnatec does great job especially when you start the engine from cold in the morning, I noticed the engine runs with less vibration that keep the noise down. These tells me that Castrol magnatec is providing a great protection to the engine. I am driving a 2012 2.5L Camry, i regularly change engine oil at an interval of 7500km for that past 5 years. Castrol Magnatec 10W-40 is always my choice that i trusted.

Nothing Compares With Castrol Lubricants – In pakistan there is a plethora of locally packed and imported engine oils.I have used in my three cars Havoline, Total and Castrol. Nothing compares with this excellent lubricant in terms of keeping the engine smooth and noiseless at a very affordable price. W 10-40 is especially very suitable for pak suzuki which recommends this viscosity for its cars. I wish Castrol had established proper outlets for its products in Pakistan.  Show details

Great Quality – As usual, best oil ever, keeps the engine cool and clean, reduce engine noises. It is expensive but worth it every cent. I have tried other brands but none of them offer the quality they castrol does. I also like the gear box oil for manual and automatic transmission.  Show details

Great engine oil for various kinds of vehicles.. old, new, and maybe for other cars in the future – Smooth idling, saves fuel a bit, throttle response is lighter... Good price for 10w-40 oil... I always check my oil every month and what i can say is the oil cling and sticks to metal... Currently using 4G15 series of engine tht pple always say it eats oil too much and i notice nothing wrong with my engine eating toooo much oil... Previous owner… Read more

used cheap oil whn i got the car and changed it ASAP to castrol magnatec 10w-40 since i trust the brand... many friends and relatives use magnatec... I hope this kind of oil will always be on the market coz im gonna use it for a long time... as long as the price is reasonable hehehehhhhhhhh.......

Toyota RAV4 – Age and distance is proof 2004 RAV4 310'000ks never missed a beat oil changed every 10'000ks and only just starting to use a bit of oil between services oil are oils and here it is Toyota 2.4lt's love Magnatec can say enough never had to open engine so how clean it is ???  Show details

Perfect for my Camry 3VZFE V6 – I have done 265000 km which is not a massive amount but have used Castrol Magnatec 10w-40w twice since it had 240000km. At the first change I noticed smoother idling and faster acceleration of the engine. I couldn't measure the fuel economy but know that if the engine is more efficient it is lighter on fuel.  Show details

The best oil does what it's meant to do – I have been using magnatec for about 10 years. I own a r33 skyline and i have used other brands oils. But nothing matches ti engine performance and its more quiet on idle. Im an experienced mechanic have more than 20 years experience. I do all my oil changes. When i do a oil change with a standard oil. I notice the oil does not stick to the… Read more

dipstick when i want a reading. This happens when the oil is so clean you cant see it on the dipstick. Strange i never have this problem with magnatec that proves to me that it sticks to metal. Great oil will continue to support the best.

Best oil ever! – I drive a 1995 Toyota Camry 2.2i manual transmission. Have been using Castrol Magnatec 10w-40 since new. It now stands at 729,954km. Due to the so-called sludge forming of Castrol Magnatec I dropped the sump on 673,254km. Not a single bit of sludge was found. I change the oil and oil filter every 10,000km. The sludge forming claim is simply not… Read more

true if you change the oil at regular intervals. And the engine uses about 0.5 liter of oil between services. I do all oil changes and services myself. The car still in excelent condition.

Great oil ! – I have a 1994 Toyota Camry, the car did not have a service for 13 months and had been running some old 20w50 oil in it, I gave the car a service, changed the oil filter and put Castrol Magnatec 10w40 in it and it was like a different car, the motor was quieter and seemed to rev up easier and the clutch changes are smoother. Quite impressed.

Sludge in a bottle – Castrol Magnatec 10W40 is mineral oil!!! Don't be fooled by the flashy marketing into thinking it's semi-synthetic. Don't believe me have a look on a bottle & show me where it says semi-syn. Previous owner of my partners run-a-round. 1.6L Corolla had been using Magnatec 10W40 in it. The engine was sludged up quiet bad as he'd been changing it… Read more

every 10K km rather 5K km. Have run some synthetic oil in it to clean out the sludge & now using 10W30 for improved fuel economy

expensive, mineral oil

Good and inexpensive product meeting the latest API specifications – Have used Magnatec 10W40 in several vehicles and has provided good mileage without compromising the engine or performance. Usually it causes ticking noise at start up which goes away after few minutes. Good price and good mileage Causes tappet noise when cold. Show 5 replies