I run 10w30 diesel oil, 1995 460.

just concerned about the flat lifters.

Currently Rotella T5. But I'm not a brand snob, I'll run just about any good deal.

always run MC filters.

change the oil once a year. Whatever the mileage happens to be.

My other ride gets whatever the dealer puts in when the computer says to go.. if it blows up it's their problem.

 

Motorcraft oil and filters here. I work in a Ford shop so its only $18 for 6 quarts and the oil filter.

 

Forgot, 10w40 for the big six, now no need for high mileage oil

 

Pennsoil 10w30 and 5w30 I'm from pa so I try to support them

 

Using synthetic gives me that warm and fuzzy feeling inside, even though it's not really necessary for my purposes. I'm not brand loyal at all with oil; I will use whatever is cheapest/on sale. Which is usually Napa store brand. When it goes on sale, I grab a case and that lasts a while. I use 5w30, which is what Ford orignally specified for my engine. No reason to deviate from it.

 

I run Walmart's SuperTech conventional 10W-30 in my truck's engine. It's got the API ratings and is usually the cheapest around so I don't mind not paying for a brand name. Never lost an engine due to oil problems yet. Actually my engines stay nice and clean inside.

Transmission, transfer case, steering all get SuperTech Mercon, brakes get whatever brand of brake fluid I happen to grab when I'm at the store. Usually WearEver or SuperTech, same deal with the axles.

Motorcraft filters for EVERYTHING, no exceptions.

Never had a problem with anything oil-related in all the years I've been buying non-brand-name lube. The ones I DON'T trust are the random bottles of oil you can find on the shelf at gas stations with names like RPMax or whatever.

 

I use Valvoline MaxLife 5w-20 Synthetic blend and also MaxLife ATF for my E4OD

 

15w40 AMSOIL

Seen Amsoil conduct test where they weld the drain plug and replace filter every 5k, oil will outlast the motor.
I replace filter at 5k, oil+ filter at 10k.

 

Shell Rotella 15w40 for summer and 5w40 for winter and MC filters of course

 

i run Castrol gtx 10 30 in the straight six, Purolator filter

 

WOW an oil thread without all the bickering.


Similar question for both of you, why 15W40? With synthetics I see no reason for the higher cold viscosity.


Me, 5W40 Rotella T6 all year in both my 460 and 7.3.

 

I run 10w30 Castrol GTX Conventional Oil with MC filter in my 460 year round.

And my dad usually buys whatever 10w30 is cheapest at time for the 351, with a MC filter.

 

I use Mobil 1 (syn) 5w-30 and Motorcraft filter.

Up to 69k on the odom, and changing oil every 7k.

Oil comes out so clean after 7k I could probably go longer...

 

Motorcraft Synth. Blend 5w

Motorcraft FL-1A.

Cheap & Original Manufacturer. Can't beat it.

 

Unheard of, ain't it? One reason I like this board better than any other is that most if us are willing to have a meaningful discussion rather than constant arguing.

Honestly I'm surprised nobody laughed at me for using SuperTech brand.
It's made by Mobil according to my research and has API certs so I ain't worried.

That's actually common in some industries. Instead of changing the oil at a set interval they just take a sample and have it analyzed for contaminants and breakdown. If it's all good then they run with it til the next sample.

I wouldn't mind doing that except I doubt the cost of having the oil analyzed is any cheaper than just buying 5 quarts of fresh oil for the engine. Now 14 (or however many) quarts of Mercon on the other hand... that I can see possibly being cheaper.