Wicker man 2 Posted May 12, 2007 ok oils abit off a dark art to me i need to top my car up it has pug 10w/40 synthetic based oil in it the only oils i have in the shed are some GM 10w/40 semi-synthetic, 15w/40 stuff none off them are no good but ive got a bottle off 10w/40 multigrade can i stick that in the car? Share this post Link to post Share on other sites
Baz 421 Posted May 12, 2007 You shouldn't mix iirc. If anything stick with like for like, ie. synthetic with synthetic or mineral with mineral. Share this post Link to post Share on other sites
Wicker man 2 Posted May 12, 2007 right-ho cheers better leave the pug on the drive till i can get down pug dealer monday for some more oil Share this post Link to post Share on other sites
dani959 0 Posted May 12, 2007 You can mix them. The worst that can happen is getting the properties of the worst quality oil (of the ones mixed...). I just toped-up my 206, running on Mobil 1 5W/50 (full synthetic), with Halfords 15W/40 (semi-synthetic). No problem whatsoever. Cheers, Daniel Share this post Link to post Share on other sites
jas-E 1 Posted May 13, 2007 hey mate, i wouldnt stick synthetic oil in a 205 mate as it would all just piss out..15w40 is best for them IMO Share this post Link to post Share on other sites
Baz 421 Posted May 13, 2007 And oil froths up when mixed. Share this post Link to post Share on other sites
Grim.Badger 15 Posted May 14, 2007 It's a myth that you can't mix oils, it's all very similar chemicals and there is no possible way that they could fail to mix properly. Like dani959 says the worst that will happen is that you will dilute the properties of the good oil with the cheap oil. I would also second that you should not use synthetic in these engines, they were not designed to use it. The basic difference between synthetic and mineral oils is that synthetic oils have a small range of oil hydrocarbon chain lengths and minerals have a wide range of hydrocarbon chain lengths. As the oil is used mineral tends to lose its shorter chain hydrocarbons making the oil heavier, thicker and less able to lubricate the engine, but with regualr changes this is not a problem. Synthetic may also have a few more detergents iirc but again if you change the oil regularly this isn't a problem. Semi-synthetics are often a waste of money as the synthetic constituant is normally a very low %. Share this post Link to post Share on other sites
ah250 0 Posted May 14, 2007 Whats a good oil then??? I've always been under the impression that oil doesnt get any better than Mobil 1 or similar? If you are saying its wasted on a normal 205 and can cause leaks etc, whats a good option? cheers Dave Share this post Link to post Share on other sites
Wicker man 2 Posted May 14, 2007 I would also second that you should not use synthetic in these engines, they were not designed to use it. it was what my pug dealer gave me for it when i went in for a oil filter thought mite aswell get some oil for it while im here total quartz 7000 10w/40 synthetic based Share this post Link to post Share on other sites
Rob_the_Sparky 9 Posted May 14, 2007 Whats a good oil then??? I've always been under the impression that oil doesnt get any better than Mobil 1 or similar? If you are saying its wasted on a normal 205 and can cause leaks etc, whats a good option? cheers Dave A VERY big subject but basically synthetic oils are better than semi, are better than mineral. However, you also have to choose the right grade of oil for your car. Personally I think synthetic is a waste of money on an old stock engine but the more expensive/stressed the engine the more likely you are to benefit from more expensive oil. Rob Share this post Link to post Share on other sites
dani959 0 Posted May 14, 2007 it was what my pug dealer gave me for it when i went in for a oil filter thought mite aswell get some oil for it while im here total quartz 7000 10w/40 synthetic based Just make sure your engine wasn't leaking with 10W. Synthetic or not, the viscosity depends on the numbers: 0W - thinnest, 15W (or even 20W) - thickest. Use the thin ones if your engine is prepared to take it and doesn't leak! You may well find that it will burn and disappear much faster, though! The second number is about high temperature, the higher the better. As a recommendation, 10W/40 (or 5W/50) for winter and 15W50 (or 10W50) for summer. You may find that the 50's are hard to find in non-synthetic... Last time I used total quartz 7000 (on a 206, not a 205) I found it to be a big waste of money! Cost me about 45 EUR and later I got Mobil 1 5W/50 for about 35 EUR. For this one (206), it definitely has to be synthetic, because it stays in the engine for 20000 miles. Synthetic becomes a big waste of ££££ when you have to change it after only a few thousand miles, so, for the 205's I'd stick with semi. Share this post Link to post Share on other sites
davev 1 Posted May 14, 2007 gsf sells quartz 7000 for 11.99+vat. not bad for o.e stuff Share this post Link to post Share on other sites
