I think this is the same old thing over and over again with synthetics versus dino. In the begining, to maintain the gaskets and seals its said that you should use Dino. Then after X amount of miles (which is highly debateable) you can benefit from synthetics.

However, on page 293 of my 2006 Magnum manual it specifically states this....

Synthetic engine oils

You may use synthetic engine oils provided that the recomended oil quality requirements are met and the recomended maintenance intervals for oil and filter changes are followed.

So I am going to assume that it comes with Dino from the factory and the shortest mileage for the oil change using the agressive "Schedule B" is requiring an oil change at 3K miles. That to in theory is enough to satisfy the conditioning of the new seals and gaskets to me.

I waited until the second oil change before I added synthetic. But anything after 3K miles I assume is good to go. I'm just old fashioned I guess.

Oh and tell your dealer it didn't change my MDS experience one bit and my crappy MPG didn't change at all. 14MPG average with an AWD pretty much no matter how you drive it.

-Tory

 

You cant use synthetic till youve broken a new engine in. Some new cars have the engine ready to accept synthetic from the get go. One is Corvette who puts it in at the factory. After the initial change and rings and bearings are seated, theres no reason not to use synthetic. Dino oil is fine for most people and it will let an engine last a long time. If you use the correct weight and rating of oil it wont make any difference to your car engines operation. Synthetic has more film strength than dino, its pretty much impervious to heat, and doesnt build up the acidity that dino does. How can that possibly hurt it. Your dealer is full of it. Mine all get synthetic and staying that way. As for affecting seals, SOME synthetic oils have such strong solvents, they will clean all residue built up around seals thats accumulated over miles. Cleaning all that off may lead to leaks that the buildup slowed or prevented. Engines with synthetic can be torn down after 100,000 miles and still look brand new internally and the synthetic will not do anything to hurt good seals.

 

That's interesting...the guy at my dealership who was trying to sell me the extended warranty told me that I could ONLY use synthetic oil in the Magnum. Of course, he was completely wrong and was using that tact as a way of trying to convince me of the need to purchase an extended warranty.
In the end, I did not buy the warranty. I took my car back to the dealer one time for an oil change. $45 and 4 hours later, and after having to clean spilled oil off of the engine cover, I picked up my car. I explained that I would NOT bring my car back to GREENBRIER DODGE in Chesapeake, VA for any service in the future.

 

I would def have made a complaint about waiting 4 hours. Most dealers guarantee less than 30 mins. I do my own in less. I dont know about nowadays, but few years ago the routine service HAD to be done by the selling dealer unless you move more than 50 miles away. Same with warranty work unless it was a problem on the road somewhere. Id write the dealer a nasty letter telling them about the long service wait, the mess they left and the bs they fed you and maybe even a copy to Chrylser Customer Relations. You may at least get a bunch of free oil changes out of it. You shouldnt ditz the dealer for their screw ups...make them do it right instead and know you wont put up with crap service without complaining.

 

That's funny.. I hope you told him to read more if he intends to actually sell cars. The only issue you will have with the MDS is if you use the wrong weight oil..DC says use 5w-20 for a reason and MDS IS the reason

 

Amsoil https://www.amsoil.com/storefront/xlm.aspx $6.oo/qt.

 

The salesman at my dealer told me that synthetic oil should not be used in these engines bacuse of it's cylinder shut-off feature. Shall I assume he's full of it??


Yes!! What the MDS requires is a 5W-20 viscosity!! Use Amsoil https://www.amsoil.com/storefront/xlm.aspx after 9,000 mile breakin.

 

I switches to synthetic after 600 miles on my R/T, no problems at all. My SRT has Mobil as the factory fill.

 

Engines need some miles to wear in and loosen up! Every car of mine has run harder and been better on gas after 10,000 miles. After 20,000 miles performance slowly deteriorates. Going to Amsoil at about 10,000 allows full wear in, but then maintains that 'sweet spot'way past 20,000! Switching too soon keeps the milder 'tight new engine' performance.

(Even my wife's Azera with dino 'til 9,000, then Amsoil, at 11,000feels like it has a V7 rather than a V6!!)