You could do that on just about any oil, Russian taxis get hundreds of thousands of miles out of their Lada engines because the engines never stop, they just change drivers. Mobil 1 did the same thing with an E30 BMW for 250k miles or something on the rollers, only stopping it for oil changes. Doesn't prove a thing. As for using it for racing - they won't be running GTX Magnatec, that's for sure! And the fact that the oil gets changed after every race doesn't do the engine any harm.....
think if you put any synthetic oil in a modern 16v lump it is fine. if i put synthetic 10w - 40 in my 1962 cooper s with combined gearbox it would blow up. If i ran a vr6 on asda 20-50 similar results.
What are you trying to tell me guys? Am I the only one who's never exparienced problems with this brand of oil? Yeah I've tried Millers, Quantum, Duckhams etc. Much of a muchness to me. Just looked in the boot of my company passat on a 53 reg. Guess what? - The emergency top-up oil supplied by VW is CASTROL SLX Question: If castrol is so crap then how come VW is endorsing it's products. My mate used to work for Audi and says much the same. Anyone?
I dont know the facts, but it seems like u guys dont either, just talking crap. Where is the evidence that castrol is so rubbish?? I have a mk2 gti 8v, owned it for 8 years, covered 120k miles in that time, total milage is now 170K and mostly in london traffic. Engine is fine, still dont burn oil, oil changed every 8K, Guess what? Castrol oil.
LOL . But in all seriousness, if VW thought castrol was that bad then they'd supply you with a bottle of extra virgin olive oil - Sorry ,Duckhams .
Castrol RS is a very good oil, fully synthetic. Lotus recommend it (along with Mobil 1) for the Elise.
Yes, new 'Dubs use SLX but only because they have some strange new "Longlife" variable servicing schedule, where there is no predetermined service interval, it just tells you on start up when it needs a service. Though as soon as it comes out of warranty I'll be doing it myself.
So what are we saying here then guys? There isn't one person who has given a good reason as to why Castrol is no good. All I seem to be hearing is old wives tails and ancient Folklore. What good is that?
I used to use magnatec in my old mk2, thought it was decent stuff. I use synta silver on the mk1 only because I have always used it and don't like to chop and change oils much. I once put in the gold stuff and it leaked alot Everyone slates castrol gtx but has anyone proved it Most engine oils are drained and changed well before they loose atleast 90% of their lubricating properties anyway
I always ran GTX in the 8V. Whenever i put the Synta in it rattled, but with GTX it was much quieter. Always used Synta silver in the Corrado as it was cheap and it leaked, but whenver i put magnatec in it, it ran quieter. Running Silver in the MK3 at the moment as i've got some left but chances are i'll be refilling that with magnatec when i service it. I've preferred Castrol in mine, although i may try Duckhams or something sometime. Wouldn't even look twice at Halfords own though, my first 8V rattled it testicles off with it!
I reckon all the main premium brands are fine, INCLUDING Castrol, for the vast majority of uses. There are lots of 911 specialists who are quite happy to put Magnatec in them, and air cooled cars (which are really oil cooled) are harder on oil than most. Havoline, Duckhams, etc, also feature I'd also recommend that you don't put fully synthetic oil in a high mileage engine, or indeed any engine that is just for road use, as it seems to get past the rings and seals more easily. You'll end up paying extra money to make a mess of your engine and your drive. The obvious exception to it would be a manufacturers strong recommendation to use it. There are a lot of people who slate Castrol on here, but haven't backed it up with any evidence.
I remember that test. back in the days when i read pb and ride religiously. IMO if u are gonna use castrol its better to use the non magnatec stuff. magnatec is ok if u change it a bit more regularly. Its just because it hold all the poo in suspension in the oil. Why not mobil 1. I used to use silkolene oils in all my bikes. Dont know if they make oils for cars tho. In spite of all my suggestions im using quantum synta Edited by: DuBDuDe
I think the reason Castrol gets a slating is because apparently they just put some additives in cheap oil and claim its synthetic. I believe Mobile or some other oil company filed a lawsuit against them saying the labling was 'missleading' but they lost and Castrol continues to call their oil synthetic. This is stuff I've read from this and the other GolfGTI forum, so don't quote me!
OK, here we go again. I built a fast road Mini engine about 15 years ago, spending much time and money in the process. I filled it with 5 litres of GTX, ran it for a couple of hundred miles, dropped the oil and the filter and replaced it with more GTX and a new filter. After 500 miles I had next to no oil pressure with the engine hot so I stripped it expecting to find a mangled oil pump or a blocked oil gallery. Instead I found most of the bearings and significant quantities of my reground, lightened and balanced crank, cam, rings and every other moving surface for that matter in the bottom of the gearbox. Incidentally the gearbox was none to clever either but I wasn't too worried about that...... I had the oil from the engine, plus the unused remains from the container tested by a lab. The reply was that the engine would probably have lasted longer if I'd filled it with brake fluid as it was nowhere near the 20W50 grade it should have been. DO NOT TELL ME THERE IS NOTHING WRONG WITH CASTROL. It may be better now and I accept I was on the receiving end of a bad batch but there is no way I would chance it or recommend anyone else to do so. There is also some more well-publicised scientific evidence of poor quality control and missing additives if you care to look for it, assuming you don't believe me. As I said above, I wouldn't put it in my lawnmower but it's a free world. Put what you like in your engine, just don't say you'd never heard anything bad about Castrol.
why the huge thing about synta silver? it's not a proper semi synthetic oil, just a blend. if your stuck try morris oils, they're pretty good quality and value.
