What is your take on mobil 1 for the 5.4.... worth it???

 

Mobil 1 is not 100 per cent synthetic. It is a good oil, just not worth the $ you will be spending on it. Motorcraft blend is a pretty good oil, if you are going to change your oil every 3-5k. If money is not an issue, go for mobil one.

 

How is it not 100-percent synthetic?

 

Mobil 1 is a full 100% full synthetic.

copied directly from the Mobil One site FAQ:

Is Mobil 1 with SuperSyn Technology a fully synthetic motor oil?
Yes, it is. To meet the demanding requirements of today's specifications (and our customers' expectations), Mobil 1 with SuperSyn uses high-performance fluids, including polyalphaolefins (PAOs), along with a proprietary system of additives. Each Mobil 1 with SuperSyn viscosity grade uses a unique combination of synthetic fluids and selected additives in order to tailor the viscosity grade to its specific application.

What's the difference between a fully synthetic and a synthetic blend motor oil?
All motor oils are made up of base oils and additives. In general, fully synthetic motor oils contain non-conventional, high-performance fluids. Semi-synthetic oils (also called "blends") usually use a small percentage of non-conventional, high-performance fluids in combination with conventional base oil.

 

Because Mobil changed its formulation to Grp III formulation. Take a look at the bottle, it won't say 100% synthetic. There is a difference between fully synthetic and 100% synthetic. That's how they get you, they play with words.

 

Fair enough.

However, what ParkM posted goes against your belief...

 

I'll retract what I said above as I missread it.

However, tell me this: What IS the difference between "100% sythetic" and "fully synthetic?"

Aren't the terms merely interchangable?

 

Check this link, some guy who owns a Ford with 4.2 L engine posted oil analysis of Pennzoil platinum, Mobil 1, and Motorcraft Blend. http://www.bobistheoilguy.com/forums...807513&fpart=1

There is nothing wrong with Mobil 1, just not a 100% synthetic oil. Pennzoil Platinum is also a great grp III synthetic oil. It is recommended that you change the oil every six months, if you put in a grp III oil. On the other hand, you can use a grp IV for up to 1 year without any damage to your engine. Pennzoil used to produce 100% synthetic oil, I still have few bottles left.

You can read more about the different kind of oils http://en.wikipedia.org/wiki/Synthetic_oil

Here is a summary

Polyalphaolefin (PAO) = API (American Petroleum Institute) Group IV base oil

Synthetic esters, etc = API Group V base oils (non-PAO synthetics, including diesters, polyolesters, alklylated napthlenes, alkyklated benzenes, etc.)

Hydrocracked/Hydroisomerized = API Group III base oils. Chevron, Mobil, and other petrochemical companies developed processes involving catalytic conversion of feed stocks under pressure in the presence of hydrogen into high quality mineral lubricating oil. In 2005 production of GTL (Gas-to-liquid) Group III base stocks began. The best of these perform much like polyalphaolefin. Group III base stocks are considered synthetic motor oil in North America.[4][5]

Semi-synthetic oils (also called 'synthetic blends') are blends of mineral oil with no more than 30% synthetic oil

 

I switched out the Factory Fill on my 2007 5.4 3v at it's first change at 3kmi, to Mobil 1 5w20, I immediately noticed a much QUIETER & SMOOTHER running engine! Especially upon a cold start! It was not my imagination! I've havent gone back & will not use anything else! It's just common sense, when a new engine runs quieter & smoother, than the factory oil, it does not take a rocket scientist to come to a conclusion about which oil is best..............

 

My 97 5.4L was switched to Mobil 1 at 30K. After the switch, it used a quart between changes, although lately my wife does most of the driving (back and forth to her work), and the usage has dropped off to about half a quart between changes. I drive a bit harder than she does, and that may be a factor. My change interval is every 3K, and the truck now has 230K on it. It runs perfectly, so my opinion is that Mobil 1 in the 5.4L is a good combination.

BTW, my Trailblazer SS has the 400hp LS2 in it, and it says to use Mobil 1 5W30 right on the oil filler cap.

 

Its pretty darn good oil in my opinion, regardless of the basestock. Here's a pic of mine at 30k miles run on Mobil 1 5W20 from day one. I'd say the stuff keeps the engine clean!

 

Don't you mean after the break in. It is essential to run regular oil to allow the engine to seal up properly during break in, then you can run synthetic. I know this is very true on motorcycles and I am assuming it would also be true for car engines.

 

Nope CRF. I switched it over at 500 miles when I changed out the factory synthetic blend fill. It uses no oil at 3k OCI's and runs great. That 650 Honda you see in my sig pic was also switched over to M1 10W40 bike oil at about 300 miles and also broke in just fine. I change it in the bike about every 1000 miles...it sees a little harder use than the truck!

 

Regardless if it's "fully" or "100%" synthetic, there are enough threads here to proving that Mobil 1 is a good oil.

Also in my years of being on the boards, I have yet to see a thread about an engine failing due to "cheap dino" oil either. Lack of oil, yes, but using cheap oil, nadda.

Use whatever turns your crank. (no pun intended) If you want to spend the extra coin for piece of mind, it's your money. I use Walmart brand synthetic and change every 5k with a Motorcraft filter and maintain the proper oil level.

And that's the moral of the story.

 

Yea your telling me, My 250F is either WOT or I'm hard on the brakes. That thing never rests lol. Sounds good on the truck, I am actually running mobil 1 in mine right now it has been great so far