Put synthetic oil in the daily driver....now what? - 460 Ford Forum
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post #1 of 22 (permalink) Old 06-19-2006, 03:53 AM Thread Starter
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Put synthetic oil in the daily driver....now what?

I finally tried synthetic oil in my '99 Ranger, so do I still change the oil at 3000 miles and hopefully benefit from better engine wear? Or do I strech out the oil changes and benefit that way?

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post #2 of 22 (permalink) Old 06-19-2006, 05:39 AM
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David I put synthetic in my Powerstroke Truck and extended the change cycle from 3000 miles to 8000 miles and the oil looks very good I also change filter then too and every other time I change the fuel filter. I can't afford to change synthetic every 3000 miles when it take 15 quarts to do it each time LOL :shock: especially at the price of oil now


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post #3 of 22 (permalink) Old 06-19-2006, 08:16 AM
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I'm running AMSOil in my daily transportation.

Oil filter every 12,500 and oil change every 25,000

So far so good.

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post #4 of 22 (permalink) Old 06-19-2006, 11:53 AM
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I changed every 7000 miles with mobile 1 in a 89 bronco II.It curently has 250,000 miles and still going strong.
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post #5 of 22 (permalink) Old 06-19-2006, 04:10 PM
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Oil Change Frequency.

I don't change my oil. It's too expensive. I pick up oil that people drop off at curbside recycling and use that to top off my oil level when its low. People are dumb to throw away expensive oil like that.

I don't change the filter either. I figure if the oil pressure starts getting high, it must be clogged so I'll change it then.

This saves me a lot of time and money.

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post #6 of 22 (permalink) Old 06-19-2006, 06:35 PM
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I agree with Byron, when the Maverick gets low (once a week) I add a fresh quart! I figure every 5 weeks, it is like new. I just change the filter when I change engines.... Works good for at least 100,000 miles for each engine. :lol:
By the way, you were joking.....Right?
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post #7 of 22 (permalink) Old 06-19-2006, 10:13 PM
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I've have used Mobile 1 in my Towncar and changed it and the filter every 5,000 since I bought it. I'm up to ~230,000 miles now with no problems. Doesn't burn oil, and passes emmissions like it was new every time.
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post #8 of 22 (permalink) Old 06-19-2006, 10:33 PM
 
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I used to run it in my 88 F250. It did wonders. I did go around 8-10k between changes, but I decided on changing the filter at the usual 3-4,000 mile range. My thought behind that ,The oil will still get junk in it. Why strain my oil through a filter full of who knows what? lol if the filter plugs, it has a built in bypass, which would dump the junk back into the system. I've never checked this out, but, filters are cheap, motors aren't.

Just my 2 cents.

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post #9 of 22 (permalink) Old 06-19-2006, 11:06 PM
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Re: Put synthetic oil in the daily driver....now what?

Quote:
Originally Posted by D.I.L.L.I.G.A.S.
I finally tried synthetic oil in my '99 Ranger, so do I still change the oil at 3000 miles and hopefully benefit from better engine wear? Or do I strech out the oil changes and benefit that way?
Don't be suprised if the seals start seeping a little after switching to synth this late in it's life.

My 5.0 Exploder... First two oil-changes with conventional Valvoline (during ring seating)... Now, Mobile 1 @ 6,000 miles. Filter changed with oil every time. Motorcraft filter. If it was mostly city driven or I towed with it a lot, I'd probly change it a little sooner.

I feel that 3,000 mile oil changes are a waste in a car that has an O.D. trans and is mostly highway driven.... Even with conventional oil. (I'll probly get yelled at now )

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post #10 of 22 (permalink) Old 06-20-2006, 12:36 AM
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I figure that 3000 mile oil changes are in the same category as the instructions on a bottle of shampoo. "Lather, Rinse, Repeat." is the way they get some people to buy more shampoo. Ever consider who is telling us to change every 3000 miles? Uhh......it's the oil companies. I think that unless you're a desert racer, every 3000 miles is overkill......ESPECIALLY if you use synthetics.

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post #11 of 22 (permalink) Old 06-20-2006, 08:12 AM
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Re: Put synthetic oil in the daily driver....now what?

Quote:
Originally Posted by BBBob_M
[Don't be suprised if the seals start seeping a little after switching to synth this late in it's life.
that's a myth. I used Mobil 1 in a 93 Escort, changed every 12K miles. Had 150K on it when I got rid of it and was still running great.

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post #12 of 22 (permalink) Old 06-20-2006, 07:04 PM
 
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Everything you'd ever care to know about oil can be found on www.bobistheoilguy.com, very cool site.
If your interested in running extended drains (long oil change intervals) in your vehicle, it's best to contuct UOA's (used oil analysis), start with a conservative number such as 5000 miles, perform UOA, extend the drain based on your finding, keep moving the drain up until the UOA findings let you know the contamination levels are getting unsafe. In my opinion any proper weight mineral oil can safely handle drain intervals of up to 5000 miles for regular duty daily drivers.
With proper filteration it would be possible to run oil the life of the engine, oil does not wear out, but rather is contaminated with carbon and other combustion byproducts, you want the oil to suspend this garbage rather than to allow it to collect in the engine.
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post #13 of 22 (permalink) Old 06-20-2006, 07:10 PM
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I've run Royal Purple 15w40 in my 97 F250 PSD for the past two years. I initially had to "cycle" the motor of all the convential oil. That means I had to drain out ALL 15qts of the synthetic at the first change after switching. Since then, I have done nothing but filter changes and adding two quarts, every 4-6k, before draining at 20-25k. Zero problems in those two years. And PSD's very picky about oil.........

If you are experiencing seal leaks after a change to synthetic, you had an oil leak already.

Working in a dealership for the past year has told me WHY 3000 mile oil changes are necessary. People are STUPID, period.

Brian

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post #14 of 22 (permalink) Old 06-20-2006, 09:46 PM
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David,

I'd stretch it to 6K and have a sample checked. It's cheap and will tell you if you can go longer.


Ranger50,

You doing a oil analysis at each filter change? I'm looking to start doing extended drains on my 01 PSD after I get a bypass filtration setup on it. Mine has 238K on it right now and doesn't use any oil. Just looking to stretch it out until it needs it. Or better yet, just change filters once every few months and top it off.

I've seen some real nice test results on some Mack trucks of just changing filters and topping off. Trucks showed minimal wear in a million miles. This was on Rotella 15/40.

Also, I personally know of some guys who have had excellent results switching to Royal Purple in their 12 and 16 cyl (Cats) marine diesels that are in their 220' oilfield supply vessels. Cat tore them down for their first inspection and said they look new. Didn't have to change out most of the usual wear items. One boat went to zero oil consumption upon switching out to the Royal Purple in a set of old Stork diesels that it had.

John


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post #15 of 22 (permalink) Old 06-21-2006, 12:58 AM
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Re: Put synthetic oil in the daily driver....now what?

Quote:
Originally Posted by Fordtek1
Quote:
Originally Posted by BBBob_M
[Don't be suprised if the seals start seeping a little after switching to synth this late in it's life.
that's a myth. I used Mobil 1 in a 93 Escort, changed every 12K miles. Had 150K on it when I got rid of it and was still running great.
So it was how old before you switched from conventional oil to synth? And who said anything about making it run bad?

Most "myths" are based on a certain amount of fact.
Conventional oil causes rubber to grow over a long period of time tightening the seals up as they expand. Synthetic oil does not do this. I don't now if the leaks (can) occur after switching to synth because the seals stop growing and self-tightening or if the seals actually start to shrink back to their original size.
Don't beleive me? Throw a rubber valve-stem into a container of used conventional engine oil and let it soak for a couple of years. It will just about double in size. Sure...seals are made of better material, but the same effect takes place just on a smaller scale.

I just mentioned a small inconvenience that can occur when switching to synth at mid-life of an engine. Not a big deal and probably not a good reason to decide to stay away from synth oil... Which is a superior product.

Sorry that this little discussion went astray of the thread topic a little.

Bob Meyer
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