I am not sure if that is a good price, since everything where I am costs way more.

I generally like to mix synthetic only with synthetic, but was not sure what type of 5W20 you were referring to.

In fact, getting the right blend if you are a 'mixer' is an art in itself. Many of the users at BITOG have special blends they like to use often with additives. I used to mix M1 5W30 and M1 0W40, and found combining them was an improvement over using either one by itself. Plus, I use to and sometimes still use depending on the situtation and additive or two.

 

Is it really a fact that Mobil1 is no longer fully synthetic? Man, how do you guys find all this stuff out? I just changed the oil recently with M1, M1 rear diff & M1 ATF for power steering.

I guess for the next change, I'll give RP a try (not that I can notice the difference).

 

*puke*
my local auto store is supposed to give my school car club 30% off
but they said they couldnt give me any discounts on oil so i paid $7.88 CAD per quart of royal purple 5w20

came out to about $49 CAD for 6 quarts after tax

i think ill save it for the winter and finish using my Mobil 1 5W30 for oil change coming up in a month that will last me for summer/fall when it is nice and warm

 

Maybe an offtopic, but I really like how synthetic oil is explained in this quote:

"At the molecular level, dino oil contains molecules of varying sizes. Imagine the floor of a gymnasium covered with basketballs, baseballs, volleyballs, and beach *****. Now imagine that all those different size "*****" are moving around, flowing past the floor. Every time a ball surface contacts the floor surface, the ball absorbs heat from the floor. That is how oil removes heat from your engine components, from surface to surface contact.

Now imagine the same gymnasium floor covered in uniformly sized golf *****. Smaller, more uniform molecules can absorb more heat from a surface, because there are more of them AND they have a larger surface to volume ratio which means they have more surface area contact. That's what synthetic oil is. A man-made "Base Stock", where all the molecules are the same size, and smaller than those in dino oil. Better heat transfer, better lubricating properties, and a lot wider temperature range without breakdown, are now obtained."

http://www.aircooled.net/gnrlsite/re...s/synthoil.htm

 

How long does it take before the dye dissipates from this oil? Reason I asked is that I usually purchase synthetic oil, and have the dealership do my scheduled oil changes (been taking both my cars to the same dealership for years). Was using M1, then just switched to RP this go around. However, I later checked the oil to verify it was at the fill line (about 25 miles later), and noticed it was a regular brown color of new oil, and am a little concerned that the dealership did not actually use the RP oil I provided. Appreciate your responses.

 

The dye burns up almost immediately. The purple dye in RP burns up even quicker than the red that Redline puts in. Unless you checked it on the way out of the parking lot, I wouldn't expect it to be purple.