Yup. Burning synthetic that leaked past the rings and valve guides was "cleaner" than dino oil. Sheesh! Butt that was the thinking.
Remember when Mobil1 came out? Theoretically you never changed the oil. You changed out the filter and topped the car off with another quart once a month, but you didn't change the oil.
Sometimes we're talking apples and oranges. My 25 year old 300k mile mule probably has different lube requirements now than it did when new, and it's thick oil and loose clearances engineering is way different than a new car with it's thin oil and tight clearance design.
I have a friend that uses cheap crapola oil, changes the filter at/before 3k, and changes the oil and filter again by 5k miles. Another who does the full synthetic oil and filter change every 5k miles, yet another who does the same at 8k miles. I don't know who's righter, they all run pretty good.
I do know what I hear and see. LAX to Pomona, round trip, is just over 100 miles per day. Every day. I used to take the Wing, I take the truck sometimes, I get the bimmer out a lot. Rotella synth makes my rides a little quieter, and adds a couple mpgs on the freeway. Chevron gas adds another one or two mpgs, versus Arco. Consistently. Only if Arco didn't charge that $1 to $1.40 "convenience" fee for using my debit card the price/ performance ratio would just barely makes it worth it. But I like using Chevron, and there's a cheap one near me (near the Arco!).
But there's been more than a few times over the years that a mechanic or two would say something like "You're paying extra for synthetic oil? Do you really want that thing to last that long?" Well, yes I do!
Oh, I forgot. I use the Purolator L30001 filter, cause size matters.
Last edited by gidgaf; 12-07-2011 at 10:23 PM.
Reason: forgot about the filter