5w-20

10-07-2008, 02:58 PM

nothing... my point is after looking at those pictures I think the owner was lieing.. (I mean its not un heard of for people to lie) I'm no pro we all know that but I know enough about wear and IMO those pictures come off to look like pictures that starved for oil.. maybe not always but many times..

saying "well I only drove about 200 miles with it low" is like saying well I only drove it DRY for 50 miles.. One persons word can be stretched to anything they want to say..

Again I am not taking the side of 5w20 I'm just thinking there is more to this then JUST oil.. because 5w20 or 20w50 you still have protection..and remember using heavier oil can actually put more abuse on an engine because it takes more force to turn the oil.

but again who really knows I am just confident that there is more to those pictures then oil weight.

look at the heat marks.. anything with oil in it (oil is a lubricant, cooling) will prolong any wear. those marks tell me that that part of the engine did not have sufficient lubrication.. and that has nothing to do with oil weight.

WE3RX7 · 10-07-2008, 06:05 PM

Kevin, I appreciate you as a builder by all means and I'm nowhere near as an expert as you, but that owner is lieing. No way did running 5w20 cause that, there is definitely more to that story.

I took apart a 44K renesis dealership serviced w /5w20 since new and it showed no signs at all of wear to that level. The engine I took down didnt even use premix and was boosted. (engine failed due to bad tune, not oil)

Also - on the reman side. True there were problems with many remans and mazda actually stepped up shutting down their largest reman facility and opening a new one here in VA actually where "the master" and his apprentice, the same guys who assemble them in japan and oversee everything came in and did a review to be sure the same procedures used in japan are now put to use in the US rebuild facilities. I have more faith in the newer remans than the ones they offered for FDs, etc.

That being said, i'd still rebuild my own, but if the dealership is paying for it, who cares.

10-07-2008, 02:58 PM	#1
SpooledupRacing Guest Posts: n/a	nothing... my point is after looking at those pictures I think the owner was lieing.. (I mean its not un heard of for people to lie) I'm no pro we all know that but I know enough about wear and IMO those pictures come off to look like pictures that starved for oil.. maybe not always but many times.. saying "well I only drove about 200 miles with it low" is like saying well I only drove it DRY for 50 miles.. One persons word can be stretched to anything they want to say.. Again I am not taking the side of 5w20 I'm just thinking there is more to this then JUST oil.. because 5w20 or 20w50 you still have protection..and remember using heavier oil can actually put more abuse on an engine because it takes more force to turn the oil. but again who really knows I am just confident that there is more to those pictures then oil weight. look at the heat marks.. anything with oil in it (oil is a lubricant, cooling) will prolong any wear. those marks tell me that that part of the engine did not have sufficient lubrication.. and that has nothing to do with oil weight.

10-07-2008, 06:05 PM	#2
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA Posts: 1,812 Rep Power: 19	Kevin, I appreciate you as a builder by all means and I'm nowhere near as an expert as you, but that owner is lieing. No way did running 5w20 cause that, there is definitely more to that story. I took apart a 44K renesis dealership serviced w /5w20 since new and it showed no signs at all of wear to that level. The engine I took down didnt even use premix and was boosted. (engine failed due to bad tune, not oil) Also - on the reman side. True there were problems with many remans and mazda actually stepped up shutting down their largest reman facility and opening a new one here in VA actually where "the master" and his apprentice, the same guys who assemble them in japan and oversee everything came in and did a review to be sure the same procedures used in japan are now put to use in the US rebuild facilities. I have more faith in the newer remans than the ones they offered for FDs, etc. That being said, i'd still rebuild my own, but if the dealership is paying for it, who cares.