Mag 1 20139 0W-20 Full Synthetic Motor Oil, 5 Quart

Update 04/15/2018: It has been 6 months since the last oil change. I have to report that my cx-5 runs a little rough on this oil. The average mpg is down, and the engine sounds louder. I don't doubt that the oil does an adequate job of protecting the engine. However, by switching to another brand of 0w-20, which is priced similarly, my car sounds a lot quieter. Original review: Used this in a new-to-me Mazda CX-5 with 38K miles. It might be me reading (listening) into it too much, but I think the engine sounds better after the oil change. Under hard acceleration on an on-ramp, the engine no longer makes a faint squealing sound that it did before. Even if this is purely my imagination, it should be at least as good as other synthetic oils. The price is competitive - I got it when it was $20.

My 1995 Honda Civic Si I just finished fully restoring has recently started running this. It hit 200k miles and I decided to try the ultra thin synthetic since I had finally finished changing every gasket in the engine, so it did not leak even the slightest. It made my engine go from a cold start high idol of about a minute, to about fifteen seconds. You can hear the irregular sound of the valves stop at fifteen seconds and watch the RPM drop to 1000. I was using 5w-30 full synthetic before to not leak too fast. The new distributor and ignition with this is like a push button start. It feels more powerful in third, forth and fifth gear. I used to be at 3000 rpm to cruise at 70, now it is 27500 RPM. Make sure to use a high performance oil filter made for full synthetic. Let that oil circulate.

I put the test to my car about 7000 miles. When I changed oil of my car, I saw some metal from the engine, which mean that this just ok. This is my opinion

Changed oil in my wife’s car

Been using MAG 1 oils for some time now in other weights, I use this 0w20 in my wife's 2009 Mazda 2. Manual calls for 0w20, so I am sticking to 0w20 though my startup temperatures never get below 20C (99% of the time). So in actual fact I could use 5W20 and it would behave almost the same between 20C to 100C. MAG1 claims to meet the API specifications and I have never seen any bad tests on the PQIA testing site for their brands. In actual fact, the MAG1 is made by Warren Distribution and their 0w20 ProLine label used for another company branding passed the PQIA test.

Great stuff. I've been using this in the quart bottles, in both 0W20 and 5W20, for a few years now. My RAV4 takes a little over 4 quarts, so this works out better - is a little cheaper, I have less bottles left over (not a problem if your car has good oil control), and there's less stuff to recycle as well. It's also easy to mark a line on the side of the bottle for how much you want to put in, so you don't overfill the crankcase.

This used to be the most reasonably priced full synthetic motor oil. I guess Amazon decided to jack up the price. Tried it, Its seems to run ok, There are some things I have noticed immediately after running the engine for a few miles: 1. Made my engine a little noisy. ( Lifter Noise ) 2. Rough Idle 3. Sluggish If those issues are a no deal for you, This oil is ok. Never had those issues when I was using Pennzoil platinum & Liquimoly. Well, I guess I found out how it actually works inside my engine. I drive a minivan and 75% of my driving activities are in the city mostly stop and go. I follow my manual's oil change intervals like clockwork...

My new 2018 Ford Mustang Ecoboost calls for 5W-30. I do a 50/50 mix of 0W-20 and 5W-30 with Mag1 Full Synthetic. I first tried this oil in my previous V6 2011 Mustang and noticed better MPGs more so than any other oil including Mobil 1. Seems to be really good oil and a good price.