10-30W or 5-40W and which is better for a zetec engine?

 

the correct viscosity of oil for a zetec is 5w 30. the lower the number means the thinner the oil. the 5 is for when warm and the 30 is for when cold

 

Cheers mate

 

Only use 5w-30 in a Zetec engine.

5w is thinner than 10w when cold.

Cheers
Simon

 

Yea 5w-30

All i use in mine

 

would you use the same stuff in a zetec turbo ?

 

I would, but use a better quality one, most 5w-30 oils are semi synthetics, but if you are running a turbo then consider a top quality full synthetic 5w-30 likes the Motul 300v or the Motul 8100.

Tech specs here http://www.opieoils.co.uk/lubricants.htm

Cheers

Guy.

 

OK, I recently changed the oil, just after I bought the car, and I put in 10-30w as it said it was ok for zetec engines opn the container but ever since its been lumpy on start-up

will get it changed on saturday, cheers for the info

 

That makes sense, a 5w will give you better cold start then a 10w.

Cheers

Guy.

 

chhers mate, cleared my head

 

fords 5w 30 oil which is called formula e is 95% synthetic. would be good enough for a turbo zetec.

 

I just used some shite aftermarker semi synth stuff from the motor factors

getting changed every 5k anyway so it don't really matter

 

Choosing Viscosity Grade

The most known engine oil viscosity classifications are as follows:

SAE (Society of Automotive Engineers) Classification:

The SAE classifications characterizes the viscosity at low and high temperature of the lubricant. The grade is given by two numbers separated by the letter W (meaning winter).

The first number, followed by W represents the low temperature viscosity, 5W, 10W, 15W... the lower this number, the more fluid at low temperature the oils, the easier the engine starts.

The second number gives the high temperature viscosity: 30, 40, 50. The higher this number, the more viscous the oil when hot.

 

http://www.tuninglinx.com/html/a_oil.html