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  #25  
Old 05-11-2010, 01:03 PM
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Re: Newbie! Need Help with oil and gas choices

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Originally Posted by 1 GRAND View Post
I will keep throwing my money away. At 3000 miles my oil is black and dirty. My oil no matter what the specs say will never exceed 3000 miles.

It's like roast beef in the fridge. After a week I could still eat it and not die, but why take the chance and get sick... lol

I don't think I know of anyone who hasn't had dark oil when they change. extended times or not. Synthetics are made to run longer like dmsfun said. The thing with synthetics is that they have detergents in it. The purpose of these detergents are to catch and hold the contaminates that are in your engine so they can get pulled out when you drain your oil. You have to remember that your filter only get up to about 15 microns, so it will pull a majority of the contaminates out. (this is from the amsoil filters that I use). So your oil will not loose that dark color. I have read from many sources that state that if the color is darker that it doesn't mean the oil has lost it's lubrication properties. One of the more important things when running oil extended periods is to make sure your filter can run as long preferably longer. That way you can filter our the harmful contaminates. If not make sure that you change your filter as needed. Example if you run oil good for 7500 and your filter is 3000. At 3000 make sure you change your filter and top off the oil.

Now I think it is good to change your fluids at regular intervals and its good you do that with diff and trans and if you have the money to keep "pouring" in to your Jeep then by all means do it. But I just wanted to help explain why extended oil changes don't have an adverse effect.

Also I personally use Amsoil now and I use the 25,000 mile/ one year oil with the matching ea filter, but will do oil changes at least every 1/2 years. Just because I can. I used to use Mobil1 before I used amsoil. With amsoil I seem to run smoother and get better fuel economy.

Longer than expected. Hopefully that helps.
-lewi
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  #26  
Old 05-12-2010, 12:09 PM
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Re: Newbie! Need Help with oil and gas choices

All oils turn dark after some time, and this is not any indication that it is very dirty or broken down. Oil analysis will prove not just how good the oil is, but how good your engine condition is, as metal from bearing surfaces. blowby etc is detected..
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  #27  
Old 05-12-2010, 03:44 PM
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Re: Newbie! Need Help with oil and gas choices

Yea talk to the amsoil dealer here. He can get you prepaid oil analysis.
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  #28  
Old 05-12-2010, 05:24 PM
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Re: Newbie! Need Help with oil and gas choices

I use Mobile 1 and can't complain. It is what most people recomended to me when I went synthetic.
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  #29  
Old 05-12-2010, 05:43 PM
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Re: Newbie! Need Help with oil and gas choices

its a great choice. my oil samples always come back great and the 5k intervals serve me very well! i use a bosch oil filter. stay away from fram, fram is probably the worst oil filters in the world! just google it, they have so many damn problems and I would never trust them enough to run one of their products!
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  #30  
Old 05-12-2010, 06:32 PM
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Re: Newbie! Need Help with oil and gas choices

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Originally Posted by Scottina06 View Post
yep...thats the throttle lag on the hemis due to the throttle by wire.
That's not entirely true. The throttle can be recalibrated.

Throttle Calibration Procedure:

Throttle calibration can substantially improve throttle responsiveness over "factory standard." Many people notice what appears to be sluggish throttle response or a "dead area" at initial accelerator depression. Throttle calibration can take care of these.

1) Insert ignition key and turn to "ON" (not start).
2) Wait for all idiot lights to go out. Check Engine Light may remain on.
3) Slowly depress the accelerator pedal all the way to the floor.
4) Slowly release the accelerator pedal until it's all the way back up.
5) Turn the ignition key to "OFF".
6) Start the engine.

Most drivers notice an immediate change in throttle response, but depending on your driving style, you may need to repeat this procedure periodically due to the computer's adaptive programming. You likely need to repeat this procedure any time the battery is disconnected.

There's a different phenomenon, a slight 'lugging' feeling when applying only a bit of throttle at speeds below 35mph. That's common to the Hemi WK, various reasons have been offered for it (MDS, transmissions torque converter) but no solid fix for it. The solution is MORE THROTTLE!

It seems to run fine on just about any gas (and premium would be a complete waste of money for this engine).

As for the oil, if you're not pushing it hard and you change regularly then it can be argued that synthetic is a waste of money. Just do not use a different weight, the MDS systems depends upon the right oil.
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  #31  
Old 05-12-2010, 06:33 PM
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Re: Newbie! Need Help with oil and gas choices

Here we go again. Any name brand synthetic oil and a good filter that are changed in the 4,000-6,000 mile range will hold up. I like the extra "safety margin" provided by synthetic oils. Mostly a matter of how you feel about it. I just hate to waste money on oil changes without a clearly-defined benefit; that money can go to something else for my Jeep. Your $$, your engine, your choice. MOPAR doesn't have a problem with it. I change my oil & filter at 5,000 miles (as I did with my other 3 GC's). Used dealer dino oil for break-in of the 5.7L HEMI and now run full synthetic and a K&N filter. HEMI likes the synthetic oil better. I like the 1" nut on the end of the K&N oil filter.

One proviso: If you tow heavy loads, idle at very high -or- very low temps (like a police car), or run it hard, I would recommend dropping the interval to 3,000-5,000 miles.

Sea story: Years ago, I spoke with a marine engineer from Exxon. He was running a Lincoln Continental for 75,000 miles and had never changed the oil! What he did do was change the filter every 3,000 miles, have a lube oil analysis done on the oil, and replace 1 qt of oil with the new filter. Never had any contra-indications of engine wear. He had access to a very sophisticated oil analysis system (and free of charge to boot). Nice story, but I'm not willing to take the chance. However, it does show that oil doesn't wear out - the additive package does. Oil does build up acids from condensation if you take short winter trips, and it does collect small particulates from its detergent additives. Better filters get more crud out.

Whatever you decide, I'll respect it. My 2 cents worth.
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  #32  
Old 05-12-2010, 07:01 PM
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Re: Newbie! Need Help with oil and gas choices

Quote:
Originally Posted by wkearney99 View Post
That's not entirely true. The throttle can be recalibrated.

Throttle Calibration Procedure:

1) Insert ignition key and turn to "ON" (not start).
2) Wait for all idiot lights to go out. Check Engine Light may remain on.
3) Slowly depress the accelerator pedal all the way to the floor.
4) Slowly release the accelerator pedal until it's all the way back up.
5) Turn the ignition key to "OFF".
6) Start the engine.

Most drivers notice an immediate change in throttle response, but depending on your driving style, you may need to repeat this procedure periodically due to the computer's adaptive programming. You likely need to repeat this procedure any time the battery is disconnected.

This sounds interesting and I am going to try it tomorrow morning. Can anyone vouch for this?
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Originally Posted by Mom owns me on Facebook
Yesterday Frankie was telling me about how he gets better gas mileage because of the way he drives, I told him he gets better gas mileage because he DOESN'T have a hemi. He didn't have much to say after that
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  #33  
Old 05-12-2010, 07:24 PM
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Re: Newbie! Need Help with oil and gas choices

yes it is true for the hemi
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  #34  
Old 05-12-2010, 07:26 PM
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Re: Newbie! Need Help with oil and gas choices

Aww no love for us 4.7s
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Quote:
Originally Posted by Mom owns me on Facebook
Yesterday Frankie was telling me about how he gets better gas mileage because of the way he drives, I told him he gets better gas mileage because he DOESN'T have a hemi. He didn't have much to say after that
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Old 05-12-2010, 11:22 PM
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Re: Newbie! Need Help with oil and gas choices

Or no love for us 3.7
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  #36  
Old 05-13-2010, 11:25 AM
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Re: Newbie! Need Help with oil and gas choices

I tired it on my 4.7 this morning before I went to work and it seemed to help out... It seemed like I used to have a slight lag in the early throttle positions. But now that seems to be gone. Idk if I'm just making my self believe it, but it seemed like it helped. As for you 3.7 owners I will test it on the 3.7 jeep when I get home and report back the results.
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