i got 28,000 and i'm debating on switching to either mobile one or royal purple synthetic instead of conventional. I have a few questions.

1. I operate in ALOT of dust and stop N go traffic so i'm affraid 7,000 -10,000 miles between oil changes is a bad idea and maybe every 3,000 with conventional might be better .

2.Can i go back to conventional oil after i have used synthetic ?

3.royal purple or mobile 1 ?

4.whats the best oil filter ? motorcraft or k&n

5.should i change it after 3,000 for the first time cuz it said to clean the motor ?

6.anything else i should know about?

 

I have used Mobil 1.

1. I drive in much dust and after 7,000 miles my oil was very dirty. It is much cleaner after 3000 with conventional oil so I stick with conventional in my truck. The wife's car gets Mobil 1 Extended life and gets a change every 10,000.

2. You can go back and forth not a problem.

3. I have heard good things for both.

4. ??? Don't know but I do know that most will curse out a fram. I have never seen a noticable difference in any oil filter I have used.

5. Never heard of "cleaning" the motor with a 3,000 mile run. Try some motor flush. Cost like 5 bucks. Read the instructions on the back you dump it in right before an oil change it really gets the gunk out. I used it in my 88 B2 and it helped it to run better.

6. ??

 

i drive in a lot of dust too and i but mobile 1 synthetic blend. its supposed to be good for 7500 but i just go ahead and change it between 3-4k.

 

iv used mobil 1 5000 since the truck was new.. im 99% sure that im gonna change everything to royal purple very soon.

and i will always change my oil at 3k no matter what oil im using

 

I use valvoline and it works great, just regular oil and I change it every 3k miles.

 

1 - Your air filter has a lot to do with that, use paper (I recommend WIX). 7,000 should be fine, but I change at 5,000.

2 - Yes, but why would you?

3 - I use Mobil 1. I've heard that Royal Purple is great for racing, but shears quickly so it's probably not too hot for an extended drain situation.

4 - Motorcraft, Motorcraft, and Motorcraft!

5 - No need

6 - your engine will run smoother, longer, and you should see a slight improvement in fuel economy

 

I have read that royal purple is a wax based oil, and wax based oils are known to cause residue build up over time. I would go mobil 1, or amsoil, that's what I have ran now for 70K with no problems.....

 

wix or napa filters (same thing), Mobil 1

 

I do my own engine work. And using mobil 1 with pure-o-later "pure one" filters changed every 5-6k miles my engines are PERFECTLY clean when torn down. Not even the lifters are coked. (which is usually the first to get so)

I use a 5w-30 when the motors have less than 50k on them and 10w-30 on anything over that. Oh and when I'm going to be spraying nitrous I always use 10w-30 as well.


Mobil 1 is still somewhat cheap at $23 for 5 quarts at my local wal mart. (only in the 5 qt jugs at that price)
And I get the filters at advance auto.

Rich

 

Do you guys think 150k is too high a mileage to changeover to syn?

 

if its not leaking and doesn't burn oil then go ahead....

 

I would change to it and then change the oil and filter agian in about 2k miles. Then start running it 5-10k in between. Fully sytnhetic oils suspend the particals. During that first change over I'd expect to see the filter get more than it's fair share of debris.

Rich

 

got off work early so i'm going to do the change today . If they have amsoil i'll run that and if not i'll go with mobil 1. i'll get the wix filter if they have it if not then i know they pep boys has motorcraft cuz i remember stocking the shelves when i worked there .

 

valvoline w/ motorcraft filter ( 21 dollars). change it every 3K.

You'll never have a problem.

No reason to spend extra money.

 

Mobil 1 5w30 full synthetic with K&N filter. Change every 5,000 miles

 

My truck is still new but always use Mobil 1, change every 5,000.

 

thats what I just did Sunday, $22 for everything (5q & bosch filter)

 

My air filter is a POS (K&N), but my oil and oil filter is nice. Mobil 1 15,000 oil. and Mobil 1 filter.

 

Why do you think a K&N is a POS?

 

just curiou, whats wrong with a fram?thats what Ive always used since my first car.

 

http://minimopar.knizefamily.net/oilfilterstudy.html

and from another site:

 

^^^ Yeah, pretty much use anything else but fram. For the price, motorcraft filters cant be beat. On the more $$$ end. Wix, mobil 1, and k&n are great filters...

 

damn, I had no idea, I always got them because I figured they were a major company and they have the grip on them which makes them easy to change so I dont need a wrench to remove them. I think I need to change it soon anyways, but I just did my brother in law's Ram 1500 Sunday and I put a Fram on it, oops.

 

I use Motorcraft filters with Castrol GTX, change every 4000.