Im pretty sure a head gasket leak would leak water not oil. you mean valve cover?

 

I would suggest that you do a search on this forum for the 153-H spec which is Ford spec regarding the 5w-20 oils. To put it short, the 153-H oils will run longer with less oxidation, are more viscosity stable, have fewer deposits, far less allowable sludge, run cooler, and run cleaner than any oil you will put in your engine. All Xw-20s that meet spec are a minimum synthetic blend. They also turn in the lowest wear metals in analysis. The newest spec will be the 929 oils. They will have even higher standards than the 153-H oils. The 929s will be available in Xw-20 and Xw-30. They should be appearing on the shelves soon.

FWIW, the M1 0w-20 has the lowest allowable HT/HS rating, higher is better. M/E is soon to be having a 5w-20 that shows great promise. From the info I've seen, it will be a PAO, ester, AN, and mineral carrier based fluid. For the highest HT/HS rating, look to Redline 5w-20.

High Temp/High Shear (HT/HS) can be defined as the oils viscosity at the bearings. The rating is in direct relationship to bearing wear. Lube engineers agree that a rating of 2.8 is required for normal wear.

Still, folks ask if it okay to run a regular or synthetic Xw-30. Provided you stick with a scheduled maintenance program somewhere around 4,000 miles between changes and use a quality product, your engine will be fine. But considering the value in the bottle, why not buy the right and best oil as recommended by the folks that built the engine?

 

nothing matches to a mineral based oil!!!!!!!
synthetics are just that,,plastic , teflon,silicone,or who knows
what tomorrow will be on the market. synthetics are coaters of your internal parts,and some are brittle after they coat at one
degree and then run another time at some heavier extreme
and thats what can cause damage,otherwise they seem slicker
but not really stronger,and some are so full of detergent packs your seals will shrivel up and bring new leaks.seals are made
from mineral base,so should oil.please read the label and get
a stronger oil,dont just go to a synthetic
see the API board,or gopurepower.com to read more.

 

Someone needs an education on synthetics!

 

explain to me how a leaky head gasket would make oil leak ?

 

I need some education on synthetics,because as a racer
I have seen most every oil out, and dislike the looks of what
they have done to motors.but if u have something I can review
I would be glad to look,but getting to whats the active synthetic
in the product you boast will the most education..plastic....
silicone....ptfe otherwise known as teflon....detergent concentrate high enough to eat your seals......

 

Beachracer

Would you say 260K miles on synthetics with not oil leaks and no major wear on the crank, cylinders, etc a one time freak of nature?

I've built and run race engines for oval track for years. Built most of my own engines and the best oil I've ever used has be Mobil 1. Yes I have run others but have always come back to Mobil 1 after see the wear on the engine. So having seen first hand with my own eyes, please tell me what I was missing all these years.


Merry Xmas

:santa:

 

Had the same thing happen with my 99 f-150. Leaked oil from the passenger side and had the head gasket replaced and hasn't leaked since. Usually if you have a head gasket let go the first thing you will see is oil in the antifreeze or vice versa.

 

I don't believe any quality synthetics have teflon in them. And plastics?

More like ZDDP and tons of other additives, to keep the oil (synthetic base stock on a good oil) stable for a longer period of time.

bobistheoilguy.com will dispel tons of myths...

 

I was responding to the post above that claims synthetic oils are made of plastic and teflon. But to answer your question oil has to pass through the heads to get to the moving parts on top. Valves, overhead cams etc. It varies by motor type. So if you have a bad head gasket you most certainly can leak oil. It depends on where the break in the gasket is.

 

Amsoil (the product I boast as you say) does not containt ptfe. Slick 50 does and that is just snake oil additive not synthetic oil.

http://www.amsoil.com/products/tso.html

 

neither product makes me smile,a motor that goes 260k is
nothing surprizing if you are a builder and you obviously tear
down your motor and measured for wear,from your writing anyway,then I'm sure with all that you have like most of us attended to anything for tolerance,and that keeps a motor
tight, not the oil !! mobil 1 has a mineral base with a cutting oil
and a lot of anti wear pack in it,but it starts with the lowers
of the base stock,and changing oil a lot will keep most motors fresh...super syn aka cutting oil......
amsoil everygrade under the sun to meet everybodies preference
boy cant we be good at 1 thing and keep it there,again contains multi level detergents and of coarse poly-alpha-olefin aka
cutting fluid and the DI pack of to keep down wear,but lets not foget,detergents that make it feel slick.

by the way ptfe is only one name for teflon,check those fram
duraguard filters.

 

You REALLY need to get some better oil info.

Please go to:
bobistheoilguy.com

Lot's of good info to dispell your myths. And they are that, myths or worse, you aren't doing anybody any favors by posting unfounded opinions when the facts tell otherwise.

Mobil 1 uses a synthetic base stock, as do most other quality synthetics.

Not trying to flame you buddy it's all good but your info is way off.

What do fram duraguard filters or teflon have to do with quality synthetic oil?

Quality synthetic oils have NEVER used teflon, Dupont doesn't even indicate oil-additive as an approved use.

Teflon was added to additives by marketing companies, not engineering companies who make good oil.

 

MOBIL 1 has it in black andwhite about the use of mineral pack
to start the building of oil,the API board has a minimum to become a oil producer,and......there after ingredients are added to make a synthetic.! look up super syn,and read for a lot of hours,,,,bob is not the only oil guy.
and for other hidden news go to about 17 of the top boards
for mobil 1 and read,then look some more.and write down all those big words and then read some into it ,ive been there.
last of all, any cheap oil of any kind is just that..

the filter news is for another reader about teflon,oh yea ptfe
made by dupont and pulled from all applications in the late
80s, and again used early 90s and again pulled.teflon
has a lot of names

 

mobil 1, some grades even say made especially for 4 cyl and 6 cyl
another line goes on about 2 products in their line up being full
synthetic,and another talking abou special formula made for
honda's,come on honda has oil made andbottled under their own
label. then I was about to leave and saw flash point info of 232
degrees.....wow, I did look into bobs ,and will read another few hrs, but nothing changed here. answer me the million $
Q. who makes castrol oil ?