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Old 10-07-2013, 04:31 PM   #16
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Synthetic Oil and the change oil light


Here is a brief analysis of my oil after 10,000 miles.

Synthetic Oil and the change oil light-image-4062334359.jpg
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Old 10-07-2013, 06:14 PM   #17
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Synthetic Oil and the change oil light


The fleet I service at work (all police units) run Amsoil (due to a business deal). We do oil sampling at every oil change by an independent lab and over the last 3 years came up with an average of 2,800 miles. At that point the additives in the oil are broken down, and at 5000 miles the little nasties started showing up: chrome, iron, zinc, aluminum, etc. in ever-increasing quantities. These are the items you should want to keep an eye on in an oil analysis. They are your bearings.

Granted, these cars see a lot of idle time followed by 'pedal to the metal' driving, so the results are definitely skewed. I personally like Amsoil's ATF and gear lube and of course their 2 cycle oil. I don't personally care for the motor oil or their filters. And yes, the 25,000 mile change is just a gimmick.

Case in point: a relative bought a used Pontiac locally, and he was quite proud of the 'lifetime Amsoil oil change package' he bought with the car. He said "I'm a busy guy and hate having to go in for oil changes." I asked what the interval was, and he says "when the 'change oil soon' light comes on, I just stop by the dealer, they change the oil filter, top off the oil, and reset the light!" He honestly could not understand why I was laughing so hard.
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Old 10-12-2013, 11:46 AM   #18
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Synthetic Oil and the change oil light


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Originally Posted by chadjohnston View Post
Here is a brief analysis of my oil after 10,000 miles.

Attachment 76544
What oil are you running?
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Old 10-12-2013, 12:24 PM   #19
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Synthetic Oil and the change oil light


Valvoline 5W-30 synthetic.
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Old 10-12-2013, 02:39 PM   #20
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Synthetic Oil and the change oil light


Pretty solid numbers.

Filter and vehicle type?

Driving style and average trip?
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Old 10-12-2013, 02:48 PM   #21
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Synthetic Oil and the change oil light


I use a Fram high-mileage. It's a Toyota Tacoma 4WD
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Old 10-12-2013, 02:49 PM   #22
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Synthetic Oil and the change oil light


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I use a Fram high-mileage. It's a Toyota Tacoma 4WD
I wasn't done. Lol. It's got the V6. My average trip is roughly 200 miles highway. I never drive over 60 and accelerate slow. I also put it in neutral going down hills. Occasionally I go 70-75 mph, but not often.
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Old 10-12-2013, 04:03 PM   #23
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Synthetic Oil and the change oil light


What's the purpose of putting it in neutral going down hills?
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Old 10-12-2013, 04:05 PM   #24
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Improves my gas mileage.
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Old 10-12-2013, 04:06 PM   #25
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I think if you had a way to really accurately measure that ... you'd find otherwise.
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Old 10-12-2013, 04:12 PM   #26
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I think if you had a way to really accurately measure that ... you'd find otherwise.
I have kept track of my gas mileage from day 1 of owning this truck. I used to average 19 mpg. For awhile, I never drove over 50, and at that time I was averaging 27 mpg. Now, the only things I do are accelerate a little slower and coast down hills and I'm getting 23 mpg. I'm not going to get that much of an improvement just by accelerating a little slower. So the coasting helps. Less strain on the motor. I can sometimes travel a couple of miles before putting it back in drive. That's 2 miles of not using much gas. That helps.



Watch the mythbusters episode about increased gas mileage.
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Old 10-12-2013, 04:16 PM   #27
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Synthetic Oil and the change oil light


I have watched the episode. But to take that one thing...and extrapolate it out, when you are clearly doing other things to improve your mileage...

Too, when coasting in gear, the momentum of the vehicle keeps the engine turning w no fuel needed. In neutral, you're burning fuel to keep it idling.

I bet if you'd not put it in neutral and kept everything else the same...your mileage would not decrease.
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Old 10-12-2013, 04:19 PM   #28
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Only one way to find out. A drive 200 miles every other day. I'll test it and get back to you.
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Old 10-12-2013, 04:21 PM   #29
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Thank you...I appreciate your experiment
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Old 10-15-2013, 04:39 PM   #30
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Synthetic Oil and the change oil light-image-1592120510.jpg

I drove two tanks normal, how I used to before I gave a damn about improving gas mileage. Then I drove with nothing changed except for shoving the truck in neutral when going down the long hills. I can continue the test if needed but I see all I need to see. I got 1 to 1.5 mpg increase just with this one step.
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