Glad I did not offend you. I have just noticed a lot of the responses to posts asking about oil turn into pissing contests more than they offer good, usable information.

 

Well said Bluegrass, Thanks.

 

always have changed 3 months or 3000 miles with AMSOIL, always will

 

Good for you. Overkill but as I said before: It is your truck so do what makes you happy.

 

I see your point on that matter, however we aren't really driving CATS around and that is a totally different condition. 50 gallons of oil will withstand more than 1.25 gallons of oil due to its greater ability to take heat and the conditions. I have no idea what the recommended interval for a cat is. I don't work on them, nor do I think one will ever pull up to my oil bay for service. Quantities that great will need different maintenence

 

Speek for yourself Cats get the engine oil change every 250 hour or about every 3 months.

 

Some of y'all think too hard about oil.

For me and the vehicles I'm responsible for, I don't go by time, I go every 3K regardless. And all those vehicles are operated in the "normal service" category, in that there's practically no stop and go driving and no extended idling since it's a 15 mile highway commute into town where we all work.

Oil and filters are cheap.

 

On my truck i change it when i get around to it. usually between 3-5k miles. but on the stang i change it in the spring because i only put about 1000 mile a year on it. if i do any work on the engine though i do change it then.

 

5000 is good, though everything I've read says there's no significant change in lubricatory properties for 10,000 miles. BMW, Audi, SAAB, etc. recommends 10,000 on the same car sold overseas; 3,000 to 5,000 here in the states because of various 'pressures' on them for doing business here.

Check out www.bobistheoilguy.com if you want to read some neat stuff concering oil, additives etc.

-Fatz

p.s. 98Navi: You don't know what you're talking about. I'll let someone else clean you up, because you are reeeeally out there.

 

ANd BMW had to recently switch all of its high performance cars to mandated synthtetic due to oil related problems on their cars that are about 5 years old. I know, I caught one for a customer on a 1998 745iL during an oil change. The engine didn't sound right, and the pressure wouldn't come up. Put it on a rollback and sent it to BMW, where they had to remove the oil pan and clean out all the sludge that was blocking the sump. Gee, I wonder why at 15K?

 

The 15,000 mile recommended service for BMW (only 15K if you drive non-severe) are for vehicles that came requiring full synthetic. My 99' 328I came with that oil and recommendation. The cars that came with dino oil had a lower mileage interval, like the 98' 740IL (no 745 for that year) you said you worked on.

BTW - My car normally gets its oil changed every 8,200 miles because the computer adjust for my driving. Even at 8,000+ intervals, I never had any sludge problems; you can't even see any inside the head when you remove the oil fill cap.

Also, how do you explain why Ford has two very different oil change schedules for the exact same truck that happens to be sold in two different countries? My uncles 04’ Expedition in the Philippines has a severe schedule of 10,000 km (over 6,000 miles), but that same truck has a 3,500 mile severe interval here in the US? And all F150s/Expys sold in the Philippines are US spec.

 

How many oh how many times must I repetitively state that synthetic oil doesn't sludge? For people that claim to know so much about oil why do I have to reiterate this 100 times? Conventional oil turns to grease (sludge) while synthetic looses its lubricity factor!!!!

And I never stated that BMW was 15K. As a matter of a fact, I stated only a few posts back that BMW has never disclosed a mileage, only said to go buy your little light meter in those cars. !5K was what a previous poster had written and and I stateing the obvious, I wonder why it would have problems at such increments.

I think this is really worthless at this point. There are people that know how to take care of cars, and there are people who believe BS. I know which is which because I see it everyday. Change your damn oil whenever you want, its your money when your motor roasts, and I"ll still be cruising down the highway on my 3000 interval.

 

98Navi I respect your insight and considering the sheer number of post you have made recently you are definitely on a personal mission here.

But I agree with you regarding changing your oil often, since it's a cheap thing to do.

But you never answered why Ford recommended different intervals in different countries? Why do they recommend such a long interval in one country and not in the US for the exact same model car?

 

Unfortunately, even I don't have all the answers. My best guess, never having been to a foreign country, would be that there is less congestion traffic wise in most other places, or that some varience in conditions is the reason. I think it would be a good question to email ford and ask them. Although, i'd imagine you'd get a form filed answer that deflected the question.

It is a good one though, I'll look into it