First time using 5W-20

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My sister just bought a 1998 Ford Escort ZX-2 with the DOHC 2.0L engine. I read that this car was back-specified to use 5W-20 so I went ahead and bought 5 quarts of Pennzoil 5W-20 along with a Purolator Premium Plus oil filter and I'll be using 5W-20 for the first time. I already had a bunch of 5W-30 but I figured I'd give it a shot, especially since it was on sale. Anyone have any thoughts on using 5W-20 in an older Ford like this? I know it works great in newer vehicles that are specified for it, just debating whether or not I should try it in this older vehicle, even though it was specified for it. Edit: The vehicle has 91,000 miles on it. Doesn't appear to use any oil.
 
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I have always found those engines to like the 30wt oil better. I would use the 30wt in the warmer weather and switch to the 20wt for increased flow in the winter... JMO \:\!
 
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demarpaint runs his Ford on backspec'd 5w20 with no issues. He'd be a good one to PM, or perhaps he will see this. IIRC, he may even be running a 0wXX in his vehicle, and his is the engine in the Ford minivan. Puro Premium Plus now, Classic white, 97% efficient, a good solid filter. IMO, you could run the 5w20 PYB/Puro combo easy 5k with no issues. Go for it. Edit, if you really felt ambitious you could search demar's posts. ;\)
 
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two of my kids cars (97escort & 99 mustang) fall into the back-speced catagory, i switched both of them over a year ago to motorcraft 5w-20 syn blend and absolutely not one drop of oil consumption on either engine, escort has 150,000+ and mustang has 115,000+. makes it much easier buying one oil, wifes 06 milan also calls for 5w-20
 
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Remember that when a car gets back spec'd, it's because of CAFE reasons. Which means it's not because it's better for the engine., it just means that it won't hurt the engine. I agree with Stevie, use 30 wt now and the 20 wt in the winter.
 
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Where you live use 5-30 year round. 20wt. is cafe.May not,not sure, hurt your engine but won't help either.
 
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 Originally Posted By: StevieC
I have always found those engines to like the 30wt oil better. I would use the 30wt in the warmer weather and switch to the 20wt for increased flow in the winter... JMO \:\!
A lower viscosity oil will pump a little easier in the winter but the oil pump flow will be exactly the same.
 
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