OK, I have finished my total swap to Amsoil. Now the testing will begin. This will include data from stock fluids and later on, Amsoil fluid oil analysis' and data from fuel mileage and driving impressions.

2011 Jeep Wrangler Sport (2door)
3.21 Gears
6 Speed

Before Amsoil Swap:
Average MPG- 22 MPG (Dash Readout) 20 MPG (fill / Mileage Method)
Before the swap, with factory fluids, I noticed dry start symptoms every morning. The engine would sound horrible until up to operating temperature. When cold out, I could hear drivetrain noise, the vehicle had a spongy gear shifter, tranny would pop out of gear on occasion, and fuel mileage was about 21 AVG. This is driving top speed 55 mpg, for 100 miles per day. I will be driving the same miles for awhile, on the same roads, so MPG should be calcutated correctly.

DURING AMSOIL SWAP:
Crankcase: Amsoil Synthetic 0w-20 with Amsoil Ea Filter. $75
Front Diff: Amsoil Severe Gear 75w-90 $18
Tranny: Amsoil Manual Transmission Syncromesh (5w-30) $17
Transfer Case: Amsoil ATF $18
Rear Diff: Amsoil Severe Gear 75w-90 $18
TOTAL COST: $146.00

Initial Impressions:
Cold Start symptoms are GONE. I'm guessing this is from the oil filter. The anti drainback valve on the Mopar filter is insufficiant at best, especially in Maine where the 5w-20 gets really thick at 0 Degrees.

Ive noticed the idle goes down faster at start up.

The vehicle is MUCH quieter when traveling with cold fluids.

The transmission is not spongy and now only pops out in 4th gear when RPM is just right.

The Transfer case goes into 4LO smoother and quieter.

REASON BEHIND ALL THIS:
Amsoil claims a 25,000 mile change interval when using their 0w-20 and Ea oil filter. (Amsoil states filter should be changed every 15k) I am not one to trust Amsoil's word on this, so I wanted to scientifically reach the 25,000 mile mark while not unknowingly causing damage to engine or voiding warranty. I will accomplish this by changing the Amsoil again, with filter, at first oil change indicator. During change I will take an Oil Analysis. If the oil analysis says the oil was good, I will then bypass the next oil change indicator and wait until the next indicator or 25,000 miles. I changed all fluids to amsoil to see what kind of fuel mileage I can get, and because working at NAPA, I get a great price on Amsoil.

I will post MPG data and Oil Analysis on this tread as I get them, so stay tuned. I hope my data can help all of you, and I can give back to this forum this way. Any input, or ideas will be appreciated.

PS- I am not an Amsoil dealer, and only sell it at work (Napa) I am NOT getting paid by Amsoil to do this! (WISH I WAS)

 

It will be interesting to see your results. I was just thinking about amsoil when I saw your post. I am going to start using it right outa the gate. I have a new jk4dr and my first change is coming up.

 

Glad to see your post. Sent you a private message.
Been using Syn oil since 1986. I believe in it. Only recently went to Amsoil for the
first time.

Magnum306

 

Oh that amsoil is pure magic.......

 

I change all fluids to Amsoil and I am impressed. Very noticable in how the 6 speed shifts. Interested in hearing the results.

 

No technical updates, but I am very impressed so far with Amsoils performance. I purposely did not drive the Jeep yesterday. In the past whenever I parked it for over 24 hours, I would get very bad cold start symptoms at the next start up. This morning at 15°F, the Jeep started as if it had been at operating temperature. On my Jeep as well as my 2003 Ford Ranger, I have notices cold starts are accompanied by elevated RPM until oil flow is registered. The Jeep would idle high and alternate RPM for about 15 seconds, until finally dropping to normal idle RPM of 800-850. The high idle RPM of 1100-1200 brings more oil too the engine. This morning, initial crank displayed no grinding sound, an idle dropped down to Regular RPM almost instantly. I don't know if this can be contributed to the brand more than the 0w oil, or even the higher quality filter vs the cheap Mopar one, but it has brought me tremendous peace-of-mind. The Amsoil brand will have a chance to really shine at first oil change.

I haven't gone through a full tank with the Amsoil, so I will post first MPG figures when I go through a full tank with Amsoil.

With OEM fluids, I noticed after disengaging 4Hi, that the front differential would still wine as it was still turning. (When Cold). The Amsoil
Differential disengages when called for.

The transmission does not get spongy when cold. I could literally feel the thick fluid when very cold out. This hasn't happened with the Amsoil MTF in the six-speed.

 

You are just giving your dealership another reason not to warrantee your engine if anything goes wrong. They will claim (and will have the right) to deny work if you're extending your oil changes to 25000.

 

My dealer is going to put the amsoil in for me. Won't affect my warranty

 

Considered and Agreed. However, I will have oil analysis from 3rd Party companies, AND receipts of various oil changes. They have to prove not changing the oil caused the damage. And they won't prove this. Plus I doubt they can prove I didn't change the oil in the first place, AND Amsoil has an engine guarantee to prove this.

What is anyone else's feelings about warranty-extended drain policies? What has happened to you?

 

Well using mobile 1 for highway driving I I ran several vehicles for 5K, changed oil filter, topped off fluids, and rotated tires and then at 10K I will change oil and filter and rotate again. I have run cars till 222K, 185k, 142K, 102K, and 73K using this method. No engine failures, although the Altima 2.5 S used 1 quart per 3K by 142K, but it's a known oil burner.