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Change in Recommended Oil Weight for 4.0L SHOC?

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Old 06-28-2004, 04:58 PM
LV Dan
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Change in Recommended Oil Weight for 4.0L SHOC?

This question hit my mind after a discussion in another thread.

My owners manual for a '99 4.0 SHOC (Explorer XLT 4wd) recommends 5w30 engine oil for all seasons.

For those of you with 2000 or newer 4.0 SHOC vehicles, does Ford still recommend 5w30 oil for all seasons including hot temperatures?
 
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Old 06-28-2004, 11:56 PM
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The answer to your question is yes, Ford still recommends 5W-30 for the new SOHC engines. But that doesn't mean shouldn't use a 10W-30 in your '99 during the hotter summer months, and in fact, that's probably what I would do if I lived where you do.
 
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Old 07-21-2004, 04:30 PM
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I always use 10W-30 synthetic, either Mobil One or Quaker State, in my '01 with the 4.0L SOHC V6. No problems.
 
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Old 09-03-2012, 06:22 PM
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Originally Posted by 94tbirdman View Post
I always use 10W-30 synthetic, either Mobil One or Quaker State, in my '01 with the 4.0L SOHC V6. No problems.
I have a 2005 Explorer with the 4.0L SOHC V6. I just changed the oil and used Mobil 1 10W30. Have the engine tolerances tightened since 2001 and should I be concerned?
 
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Old 11-20-2012, 05:38 PM
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Originally Posted by LRunestad View Post
I have a 2005 Explorer with the 4.0L SOHC V6. I just changed the oil and used Mobil 1 10W30. Have the engine tolerances tightened since 2001 and should I be concerned?
No. The change to 5w oil in all engines was driven by the need optimize fuel economy. Everything that can be reasonably changed to improve fuel economy is being done, driven by regulation and market demands. Some items such as electric power steering ilo engine driven hydraulic make a noticeable difference, some such as going from 10w to 5w oil is a minor change. Expect to see 0w recommendations.
You are good to go for as many miles as you wish to keep the vehicle.
 
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