wich oil do you guys that run synthetic recomend for 5.4 liter mobil1 or amsoil?

thanks,
jeff

 

Its all a matter of preference. I use Mobil 1 in all my cars and still change it every 3500- I'm **** like that. My dad swears by Royal Purple but it is more widely available in Va. where he lives. Actually, Pennzoil makes a pretty decent product, too. We used it at the Volvo dealer I worked at whenever someone requested synthetic.
Just make sure that you stick with whatever viscosity is recomended for your truck, but the brand is just preference.

Cheers.

 

Mobil 1. Ive used Amsoil in the past and wasnt impressed with it.

 

Lubrication engineer, Kit Sullivan, gives high marks for Wal-Mart's Supertech full synthetic....I use 10W30 in my 97 F150 and 94 Lincoln TC. The 94 Ranger 4.0L Cologne V6 I gave to my granddaughter likes it as well. The product has a built-in seal conditioner that serves older engines well. It completely stopped the minor consumption on my TC.

I change the oil at 3000 mile/6 month intervals.

Going for a long haul between oil changes is not good for a couple of reasons: The oil gets dirty and contaminated with very fine abrasives that the filter can't remove. The additive package in the oil gets depleted and leaves the engine parts open to corrosives.

As has been observed by others in this forum, why run the risk of damage to a fine machine just to save twenty or thirty bucks?

 

see next post

 

I only use Mobil 1 in all my vehicles, including my new 4.6L 2008 Crew Cab and three Hondas. If it is good enough for all new Porsches, Mecedes, BMW and Rolls-Royce from the factory, then that's good enough for me.

 

i use waste oil from garages... free for the hawling.. mine works awsome... and the price is right up my alley.. FREE...

 

This day and age, oil is that refined and good you should get at least 100 - 250000 miles between oil changes.. no problem at all.. just keep adding to it with waste oil.

 

Mobile 1 always.

 

Mobil 1 and Amsoil are very similar. Same synthetic molecule, similar additive package, darn near identical. Both are great and just use whichever is cheaper.

There are four basic categories of oil in my opinion.
-store brand mineral; wal mart, auto zone
-name brand mineral; quaker state, castrol, valvoline, etc
-name brand synthetic; the sythetic version of the above
-premium synthetic; Amsoil, Mobil 1, Royal Purple, Red Line

I put Mobil 1 in with the premium synthetics since they are really that much better. Keep in mind that the term "Synthetic" does not mean that the oil was made in a labratory, its a qualification of its purity. Many of the name brand synthetics like Castrol's Syntec are NOT synthetically produced, they are simply crude oil stock filtered and cracked sufficiently that they pass the SAE's purity test and can therefore be called synthetic even though the base stock comes out of the ground. Mobil 1 and the other premiums are actually synthetically produced.

Considering that 99% of the oils out there are sufficient to protect your engine, the premiums like Amsoil are potentially HUGE overkill. Debating the quality differences between Royal Purple and Red Line is like debating which is stronger; a red F150 or a black F150. They're all excellent.