Recent content by hp79

Originally Posted By: Papa Bear Originally Posted By: hp79 I recently ordered 12 quarts of 5W20 Valvoline full synthetic from Amazon, but they shipped me 5W40. It looks like they ran out and shipped 5W40 instead. ? I have received 2 shipments from Amazon that were incorrect/damaged and...

Thanks for all the replies. It is still confusing me though. I read that mixing different brand / grade oils is possible but not such a good idea because the additives might be different, and some might even negate each other's additive. Again, I still have 12 qts of Mobile1 5W30 and 12 qts of...

I have a 2007 Hyundai Elantra with 56000 miles on it. Since I bought the car from 28000 miles, I've been using full synthetic 5W30 the whole time. I used 12 qts of Penzoil platinum ($1 after rebate per quart), 12 qts Mobil1 from Costco (cheap after coupon), 5qts G-Oil (free after rebate). I...