If the factory recomends changing oil every 5k miles and Mobil one states that a regular oil change of 3k miles can be extended, how many miles is really appropriate to run Mobil 1 fully synthetic in a 2004 5.4L engine? Most of the use is just standard street driving, nothing too strenuous, although some on road four wheel driving in the northeast snow.

 

think of it like this..

change it at 3000 every chance you get. but if cash is tight that week you have room to wait til next week.

 

5k minimum.

 

Standard Mobil 1 is good for 7500 miles or 6 months, whichever occurs first. This assumes you use a quality filter.

 

If your out of waranty I'd extend to 5K or so, If inside waranty such as myself, I usually stick to 4k intervals.....

 

i went every 6-7

 

Many moons ago I had a turbo charged car that I had turbo issues with. Question I had was also how often to change oil. Had the oil checked after several different intervals. Factory interval the oil was loaded with coke (burnt oil), went to lower miles and less coke. At around 2500 to 3000 it was negligable. I drive one way, you drive another. It was also a differnt vehicle. The moral is if you really want to know when you should change your oil in your vehicle get the oil checked. My results were very surprising to me. I now change every 3000 miles regardless of type oil. Its the trash and contaminents that count. Only way to get ride of them is to change the oil and filter .

 

I change every 6k miles with a MC filter. Add a qt of oil at 3k miles.

I just rolled over 180,000 miles not too long ago and regularly tow the TT in my sig....

Works for me...

Mitch

 

Turbos are a whole different story due to the coking issue. Those have to be changed a lot more frequently.

 

Thanks for the input, I think that I will change oil around 7500. When you suggest a quality filter, do you mean something along the lines of a Fram Double gaurd or Napa supreme? Is there something better? :santa:

 

I have never been impressed with FRAM products, stick with EOM to make sure you have a quality filter designed for your engine

 

Good filters? Motorcraft, Wix (NAPA Gold), Mobil 1, Purolator, Amsoil.

 

I let mine go for about 5k mile intervals

 

...x2

 

Check the Mobil 1 website.

http://www.mobiloil.com/USA-English/.../Homepage.aspx

Mobil 1 brand offers several different formulations. Just read the bottle.



Mobil 1 Extended Performance
You've never seen an oil like this before. Mobil 1® Extended Performance is a high-endurance motor oil designed for longer service intervals. It is a fully synthetic formulation that helps extend engine life, reduce oil breakdown and minimize engine wear -- all while helping to keep your engine clean. Improvements that add up to exceptional protection for 15,000 miles. Guaranteed.

Benefits:

* Guaranteed performance and protection for up to 15,000 miles.
* Mobil 1 technology designed for today’s longer service intervals.
* Proprietary formulation with 50 percent more SuperSyn helps keep engines running like new.
* Helps extend engine life by reducing wear and oil breakdown.
* Mobil 1 technology has been field tested over the last 30 years in the most severe driving conditions.
* Suitable for cars, vans and light trucks.



Mobil Clean 7500
Mobil Clean 7500, a synthetic blend motor oil, provides outstanding protection for today’s longer service intervals — with 18 percent more cleaning agents than even Mobil Clean 5000 to protect critical engine parts for up to 7,500 miles under typical driving conditions.

Benefits:

* Guaranteed performance and protection for up to 7,500 miles.
* New synthetic blend engine oil designed to exceed engine warranty requirements.
* Contains extra cleaning agents to help prevent the formation of sludge and other harmful deposits.
* ILSAC GF-4 and API SM certified.
* Does not require a special oil filters.
* Suitable for cars, vans and light trucks.



Mobil Clean 5000
Want a conventional oil that protects for today's longer oil change intervals? No problem. With Mobil Clean 5000, you’ll get 16 percent more cleaning agents than our conventional oil, Mobil Clean (available in installed facilities only). Extra cleaning power that helps your engine run cleaner than with other conventional oils — even with today’s longer oil change intervals. In fact, Mobil Clean 5000 is guaranteed to provide excellent performance and protection for all car engines for up to 5,000 miles of normal consumer driving.

Benefits:

* Proven protection of critical engine parts from lubricant-related failure for 5,000 miles or six months, whichever comes first.
* Designed to exceed most engine warranty requirements.
* Outstanding wear protection for critical engine parts during today's longer service intervals.
* Extra cleaning performance to help prevent the formation of sludge and harmful deposits.
* Meets key industry and OEM requirements (see specific viscosities).