So I am looking to do the drain and fill myself but I have a question I can't seem to figure out. I spoke with the dealership today and made sure I had the correct weight for the fluid. I have a 2013 Charger Daytona 5.7 RT R&T @ 55,000 miles and it has the 215mm Rear Axle which called for MOPAR Synthetic Gear Lubricant SAE 75W-140. After speaking with the dealership more and they checked my VIN I was informed that it is NOT a limited slip differential. So they want to charge a lot for the drain and fill and I decided I would do it on my own but each bottle I look for that is 75W-140 all say they have a limited slip additive in it. I am curious if that will cause issues if my does not have that. I searched on here trying to see if this was discussed and I can not find anything. Here is what is called for my car: Mopar https://www.amazon.com/Genuine-Chrysler-4874469-Synthetic-Lubricant/dp/B000TWI4DO Here are other options I was looking at but all include the additive: Royal Purple https://www.amazon.com/Royal-Purple...e=UTF8&qid=1510419411&sr=1-3&keywords=75W-140 Mobile 1 https://www.amazon.com/dp/B009IF3KFK/ref=sspa_dk_detail_0?psc=1 Lucas Oil https://www.amazon.com/dp/B000BCKWVE/ref=psdc_15719351_t4_B000IG7PMM If it is not worth going to a different brand then I will just buy the Mopar kind. I was just curious if I have options or not. Thank you for anyone who can shed some light on this.