full synthetic
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Mountain Pass
Joined: May 2004
Posts: 173
Likes: 2
From: WI
full synthetic
I've been posting some questions in the Oil forum but I wanted some V10 specific opinions. I want to switch to full synthetic oil but the brand I want to use doesn't offer full synthetic in 5/20. They offer 5/30 and recommend using it in place of 5/20. The brand is Schaeffer Oil and have more than an excellent reputation as an oil manufacturer. I can get it for a discounted price which is a little less than buying motorcraft off the shelf.
Postmaster
Joined: Jun 2008
Posts: 2,564
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From: Wayyy NoCal, USA
I would not hesitate to use the 5W30. The early V10's called for 5W30. Then Ford released their 5W20 and changed the recommendation for later years.
Several of us did research and could not find any changes to bearing clearances or other oil weight sensitive design changes.
Several of us did research and could not find any changes to bearing clearances or other oil weight sensitive design changes.
Postmaster
Joined: Oct 2008
Posts: 3,924
Likes: 6
From: Richmond BC
just be prepared for the Synth oil to dissappear a little more then dino oil in ur truck.
these MOD motors seem to magicaly allow Synth oil to slowly drop a quart or 2 over the life of a oil change interval.
nothing radical but more so then what the truck would do with the same weight in dino oil.
these MOD motors seem to magicaly allow Synth oil to slowly drop a quart or 2 over the life of a oil change interval.
nothing radical but more so then what the truck would do with the same weight in dino oil.
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Hotshot
Joined: Mar 2007
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From: Pa
My dad was using over a quart in 3k miles. I changed his PCV valve for him and the consumption went to next to nothing. The truck had around 75k on it at the time.
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Mountain Pass
Joined: May 2004
Posts: 173
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From: WI
A co-worker just switched to Schaeffers Supreme 7000 5/30 para-sythetic in his wife's 5.3 liter Chevy and said it used a quart and a half in a short period of time. Before he switched it used very little oil if any. I'm wondering if the synthetic oil loosened up some gunk and caused PCV failure. He was gonna ask the Schaeffers Rep next time he stops by the shop. I'm probably gonna go ahead and run the full synthetic 5/30 in my V10. Costs me the same as store bought oil, so why not use the full synthetic. Plus I get free oil analysis.
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A co-worker just switched to Schaeffers Supreme 7000 5/30 para-sythetic in his wife's 5.3 liter Chevy and said it used a quart and a half in a short period of time. Before he switched it used very little oil if any. I'm wondering if the synthetic oil loosened up some gunk and caused PCV failure. He was gonna ask the Schaeffers Rep next time he stops by the shop. I'm probably gonna go ahead and run the full synthetic 5/30 in my V10. Costs me the same as store bought oil, so why not use the full synthetic. Plus I get free oil analysis.
Just so you know, Amsoil does make both a 5W-20, and the better "Signature Series" 0W-20 full synthetic oil that will be compatible for your engine. I use the Signature Series 5W-30 for my '98, and even though I've been running Amsoil in it since it only had 20k on it, it will still use a quart after 5-6k miles.
John
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John
Cargo Master
Joined: Apr 2010
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From: Seattle area
I'm using Schaefer's 5W20 and really like it. An oil analysis showed I can go about 8k miles between changes.
I also picked up about 0.5mpg improvement. One of these days I'll post my data...
I also picked up about 0.5mpg improvement. One of these days I'll post my data...
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I now just do Amsoil's recommended 1 year oil change, as I don't put hardly any miles on it anymore. I only use it to tow my boat in the summer, and to drive back and forth to my semi in the winter.
John
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