synthetic/regular oil question
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New User
Joined: Feb 2009
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synthetic/regular oil question
I have a 1999 F-250 V10 gas. I recently put 3 quarts of Mobile synthetic and 3 quarts regular Mobile. Is this okay for my engine? I have read this is cheap way to make oil synthetic blend. Any thoughts?
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
Buy some Motorcraft 5w-20 synthetic blend oil. It will be cheaper than buying 3q of dino and 3q of synthetic. You won't have to wonder if they mix well together, which they should no problem. MC blend oil is cheaper than dino often times.
Junior User
Joined: Jul 2005
Posts: 73
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mc 5w20 is great oil, get it at wal mart. I ran mobil syn for a long time and moved to 5w30 val syn which protects 4x better then m1 well that is what they say. I know one thing for sure you can't go wrong with what ford says to use.
Senior User
Joined: Feb 2009
Posts: 215
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From: Upstate NY
is there any reason you cant use full synthetic? Im gettin ready to change mine and I was thinking of going with a full synthetic oil..
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New User
Joined: Feb 2009
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I would run full synthetic but it cost too much money for the efforts and I like to change my oil every 4-5000 miles. I have heard too many complaints with not changing full synthetic for 7-10000 miles.
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Postmaster
Joined: Jun 2008
Posts: 2,564
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From: Wayyy NoCal, USA
Your priorities and desires closely match mine! I normally run full synthetics in my rigs, but with towing, I like changing pretty frequently. Mixing SHOULD be OK, but there is a tiny risk the combo you choose results in a less than optimal additive package.
I decided the MC 5W20 semi-syn blend was the best solution for me.
I decided the MC 5W20 semi-syn blend was the best solution for me.
Senior User
Joined: Feb 2009
Posts: 215
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From: Upstate NY
I have used full synthetic for years now. I had a geo metro with a 3cyl motor running full syn and changed every 4-5k and that car had over 200k on it when the frame broke, motor never used a drop of oil. I plan to run only full synthetic in my v10 also, I know it takes like 6 quarts but you can still do a complete oil change for around $35 and thats only 7/10 of a penny per mile if you change it at 5000 miles. sounds like a good deal to me.....
Senior User
Joined: Mar 2008
Posts: 342
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From: Maple Ridge, Canada
Leave the mixing to the labs. We're talking chemistry here.
Run full Syn its just all around better or run Syn blend if costs are an issue.
Regular Dino oil with regular filter changes has worked for decades. be religious on the interval.
Blending it yourself is a crap shoot IMO.
Damn, thats like mixing Canadian club whiskey into Crown Royal.
Run full Syn its just all around better or run Syn blend if costs are an issue.
Regular Dino oil with regular filter changes has worked for decades. be religious on the interval.
Blending it yourself is a crap shoot IMO.
Damn, thats like mixing Canadian club whiskey into Crown Royal.
Fleet Mechanic
Joined: Feb 2004
Posts: 1,902
Likes: 9
From: Northern IL
Im useing full synthetic on my 2005 SD and I still change it every 3 months/3k.
In the summer I was thinking about useing motorcraft synblend and of course im useing the great motorcraft filter with any oil I use.
~Gage~
In the summer I was thinking about useing motorcraft synblend and of course im useing the great motorcraft filter with any oil I use.
~Gage~