I heard that synthetic oil will cause engines to burn oil especially when miles go above 50K

 

What???, never heard of that! The reason why I switched to synthetic is because of my friends who own older (1983-1986) vehicles and ran synthetic in their engines and ended up with no problems. I use Castrol synthetic because, well, thats what my dealer uses and so do my friends. My truck is at 52,000km (32,000 miles) aprox. and going strong with synthetic. I change my oil every 6,000 miles and use only Ford oil filters.

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1997 4x4 XLT 4.2l ORP 5-speed
For more details and pics please see my site...Thanks
www.eph1fifty.cjb.net

 

NO WAY! I have never heard of a single case of synthetic oil causing an engine to burn oil once it hit 50,000 or more miles. That is completely not true! Where did you hear/read this??

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2000 F-150 XLT, 4x2, 5.4L Supercab, Styleside, Black with silver two-tone, 3.55, class III towing package with heavy duty cooling package, 4 wheel disk ABS, overhead console, sliding rear window, keyless entry, dark graphite interior, in dash CD, Pendaliner bedliner, K&N air filter, rubberized undercoating, cabin filtration system, Bugflector II, 5W-30 Mobil 1, engine build 10/4/99, Superchip now installed..WOW!!!!




[This message has been edited by Dustoff (edited 03-10-2000).]

 

You got some bad info, we use synthentic oil in alot of your shop vehicles some have over 600,000 miles on them (diesel) they dont use any oil, my chevy truck that i had a wheil back i used mobil one in it i bought it used it had 97,000 on it when i switched and had over 132,000 when i sold it no engine problems at all, no oil usage, or leakage.

Iwould not use sythentic oil in my truck if i did not get it for free, i change my oil every 3000 miles, I think it works great but if you do your regular service's you will be fine. I used regular oil before and have gotten over 125,ooo miles with the same results, If you use your truck for severe service maybe sythentic oil is the way to go, but if you look up oil type or kinds here in the search tpoic you will find tons of info.

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*2000 blk xlt f150
*5.4 4x4 3.55 ls
*sc orp pkg
*tow pkg, 17 inch wheels
*herculiner,remote start
*flowmaster, air box mod
*bfg ko's A.R.E. cap
*sony 10 disc cd player
*k&n air filter
*superchip
* havoline synthetic oil
****mods to come*********
harley davison hitch reciver plug.
removing stock cab steps& installing westins.

 

I've heard the same thing, hilltop. I think the reason for the rumor is that an engine wears faster with normail oil (depending on drain interval and driving methods), and a build-up develops that seals the engine. When the engine is flushed and synthetic is installed, those deposits are no longer present to seal the engine, and more oil subsequently gets into the combustion chamber. I don't know if that's true, it's just what I've heard.

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'99 Lariat Supercab 4x4 SS
5.4L, 3.73 Diff (9.75" LSD Rear, 8.8" Front)
ORP: Skid Plates, LT265/70R17 GY Wrang. AT/S
Group III towing: HD Electrical/Cooling, GVWR 6500# (Extra leaf spring).
Step Bars
4W Disc anti-lock brakes
K&N filter
Stock Items That Differ Across F150s: Steel Driveshaft, Oil filter bolted to engine w/ drip guard, 4R70W transmission.

 

One thing that switching to reg oil can cause is a leak that is due to the fact that regular oil have a swelling agent in them to insure good sealing property's. sythentic oil do not, this is not the fault of the oil if it leaks the sweeling agent makes the seal a little softer and switching can cause the seal to shirnk, switching back is your only cure we have ahd this happen on a couple differant occasions. m Slick 50 caused a major oil leak once it had 120,000 miles no leaks in a few days after adding the slick 50 it was laking so bad you had to add oil dailey we drained the oil and changed in it about a week it sealed up.

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*2000 blk xlt f150
*5.4 4x4 3.55 ls
*sc orp pkg
*tow pkg, 17 inch wheels
*herculiner,remote start
*flowmaster, air box mod
*bfg ko's A.R.E. cap
*sony 10 disc cd player
*k&n air filter
*superchip
* havoline synthetic oil
****mods to come*********
harley davison hitch reciver plug.
removing stock cab steps& installing westins.