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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 04-26-2007
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Oil

Our trucks require 5w 30. If I were to use 10w 70 would it be ok? thanks
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Old 04-26-2007
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WTF?? LOL.... Bryan, I know that you are smart enough to know thats not ok.
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Old 04-26-2007
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I was scared to just make this thread because I feel really stupid! I get my oil changed by a local mechanic. He wrote on the sticker 10w 70. I think that he just wrote down the wrong number. I just got it changed 500 miles ago. If it really was 10w 70 would I be able to tell? I can't even find that weght oil on the net so I'm pretty sure it's a typo error.
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Old 04-26-2007
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Well it's a much thicker viscosity oil. Are the temeratures really that hot out in Phoenix(in april)? lol
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Old 04-26-2007
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The daily highs are in the high 80's - low 90's and in the summer the daily highs are 100-115 on averge but sometimes hotter. I'm mainly curious if it really is that heavy of an oil will I be able to tell and will it screw up my engine?
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Old 04-26-2007
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I don't know that you would be able to tell or not on start up seeing as it is sooo hot there. I would however think you could tell just driving it, I mean, 10w is twice as thick as 5w. Your performance would be down along with your fuel mileage I would think.

Sorry about my comment before, I thought it was a joke since you stated that you knew what our trucks are supposed to run.

Me personally, I would take it back, with the bill and not leave until they change it, that is really the only way to tell. Then you get a 500 mile flush!
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Old 04-26-2007
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what does the 70 number mean?
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Old 04-26-2007
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When I ran dino oil in my vehicles, I used 5w in the winter and 10w in the summer. Synthetic is suppose to hold it's viscosity much better under heat.
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Old 04-26-2007
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Quote:
Originally Posted by outdoorsman
what does the 70 number mean?
The weight when cold. So that would be how thick it is in the morning....how does it start?
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Old 04-26-2007
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the thicker oil in the summer is good since it gets hot....that way the oil doesn't get too thin and run all down into the oil pan.......you want some oil to stay in the top end so everything up there is lubed when it starts......
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Old 04-26-2007
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It starts right up without hesitation. Every once in a while it'll hesitate for a tenth of a second but it has always done that. What could the effects be if I ran it to the 3000mile mark. With it being hot out I'm not too worried, but just curious. I'm pretty sure they put in 10w 30 and accidently wrote 70. Can anybody find a 10w 70 oil. I'm pretty sure he uses shell oil and quakerstate and neither seem to have a 70 .
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Old 04-26-2007
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Well if it seems to run the same, i wouldn't worry, it was probably a fat finger mistake. If it does bother you, then I would do as I said above and MAKE them change it again, if for nothing else other than your piece of mind...
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