Clear editor. Upload or insert images from URL. What engine oil do I need for Fiesta Zetec 1. Share More sharing options Followers 0.
Reply to this topic Start new topic. Recommended Posts. Posted November 11, Link to comment Share on other sites More sharing options Luke4efc Posted November 11, Matt82 Capodecina Joined: 13 Mar Posts: 16, Detergent, dispersant, oxidation and corrosion inhibitors and friction modifiers are incorporated to give excellent performance in many modern gasoline and small diesel engines.
It is particularly suitable for use in the latest Ford gasoline and diesel engines where this type of oil gives maximum fuel economy and engine durability. That's what I use in the ST. Good stuff and not too pricey either.
I used that 10w40 variant in the Rover on my last oil change. It's been in for about 4, miles and the car hasn't used a drop of the stuff. Last edited: 16 Jan I think the zetecs as in zetec engines, rather than zetec trim level require a specific oil.
Tue 6 Jun Ford Zetec engines: oil - kithmo. The Ford oil is a A1. The 5W is thin enough to circulate quickly when cold and thick enough to give adequate protection.
Tue 6 Jun Ford Zetec engines: oil - Statistical outlier. I'd have to disagree. Protection is primarily a function of flow, not thickness obviously this breaks down beyond a certain point so 3W30 will be better than 5W40 under normal operating conditions. I read somewhere that racing engines need a thicker oil as they run hotter.
There was a great link in the technical section a while back about this. Tue 6 Jun Ford Zetec engines: oil - robcars. Not necessarily because he is wrong or not, but because oil is at best a compromise. Their main consideration is sufficient lubrication with minimum drag for fuel economy and easier starting. This is not necessarily good for the long life of the engine. It is only the thickness of the oil that stops any 2 metal surfaces rubbing together, and within reason, the thicker that oil the greater the protection generally.
If the lower figure is the same, there's effectively no difference in cold-protection performance, is there? In general, I thought that the lower the W figure e.
The higher the second figure, the better it protects when hot, with anything over 40 being unnecessary for ordinary UK cars but relevant to high-performance engines run in hot ambient temperatures e. The higher the second figure, the less readily it flows i.
The logic of the 5W choice for Zetec engines would appear to be that it is suitably thin when cold -- it flows more easily around the cold engine than a 10W would -- and suitably thin when hot, flowing more easily than a 5W would at the same temperature and therefore more certain to provide sufficient flow around the vulnerable components running hot.
But I could be wrong. And just to throw another drop into the barrel, at A 0W is always the better choice, always. The 0W is not thinner. It is the same thickness as the 10W at operating temperatures [i. The difference is when you turn your engine off for the night [i. Both oils thicken over the evening and night. They both had a thickness, a viscosity of 10, when you got home and turned your engine off. That was the perfect thickness for engine operation.
As cooling occurs and you wake up ready to go back to work the next day the oils have gotten too thick for your engine to lubricate properly. It is 75 F outside this morning. One oil thickened to a viscosity of say 90 [i. The other thickened to a viscosity of 40 [i. Both are too thick in the morning at startup. But 40 is better than Your engine wants the oil to have a thickness of 10 to work properly.
You are better off starting with the viscosity of 40 than the honey-like oil with a viscosity of
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