Perusing other threads, I guess this one was closed again today? I didnt see anything evil so I guess the offending posts were deleted, anyways, Terry wrote somethere along the lines 'If quad is honest then he will be serious about education/learning' etc. Dont remember the exact quote. So to extend the olive branch here is my idea. Long post, so if you dont like em, bail now, if you dont like my idea, say so and Ill withdraw the offer....but here goes. I propose a long term test. I will pay for everything. You guys get to set up the rules and run the test. The vehicle: 1991 chevy S blazer with a ton of miles, is going to receive a new motor *soon*. A zero mile reman*(1) I will pay for the parts. I will pay for the oil, oil filters and air filters and you all by consensus get to tell me what to use. I will buy test kits from terry and let him do UOAs. At the end of a pre-determined goal, we will tear it down and quantify with no ambiguity, what we think we saw during its life. If the test ends early due to catastrophic failure, then I will tear it down and we will find out why. If the test ends early due to wreck (god forbid) I will tear it down and take measurements then, OR donate the engine and the labor to install it elsewhere in someone elses vehicle. If I get tired of the vehicle (we have talked of replacing 2 of the vehicles with a Tahoe-ish vehicle in about 2 years) I will *GIVE* it free of charge to someone on this board to keep driving for the test(but they register it and insure it) If anyone wants to donate a maint cycles air, oil or oil filter, I will let them, ditto for time. The S10 is my daily driver in the summer, wifes daily in the winter (it has 4wabs and a locker rear as well as 4x4) It will tow*(2) in the summer. My only rules: the oil filter must be a direct replacement for the PF52. there will be a remote cooler on it when the new engine goes in, I already have the adaptor. The air filter must be a direct replacement for whatever stock filter I use (ac346?) The oil must be at least the specified service level for 1991 vehicles (meaning no SA or SB) and the proper grade (no 0W10 or 60wt for example) And the maximum service interval will be used as per the owners manual, unless its an interval when I really tow a lot. the initial oil fill will be pennzoil dino in 10/30 for 1000 miles with a PF52 - a nice break-in oil experience has shown me. In short, I want to simulate what Joe user who obeys the manual might do. *1= the engine is from advanced auto. It is a reman from 'Recon' - a mexican company that supplies engines for most auto parts stores in the USA (they might not be the EXCLUSIVE supplier for some chains, but most chains you can name carry their motors.) It is a $1300 unit I got on ebay for $700 from someone doing a 91 K1500, but abandoned the project, it has been in plastic since last september. It is a stock 4.3L v6, 160hp, 250ft T, listed as .030 over, .010/.010 under*(3). It will have the stock roller cam removed and an edelbrock performer roller cam, edelbrock performer manifold added to get to appx 200hp and 270ish ft. The radiator will be brand new and it will have green coolant in 50/50-60/40 mix with a 180 thermo. I will not be using the melling stock oil pump, I will be using a hi-vol melling (or equiv) with the stock spring....same 5qt sump (+/- to account for the cooler) *2 = I tow a 5000lb boat appx 2 miles from parking to the ramp each time I go out. Occasionally I bring the boat home <5miles to clean or refuel. It will have no Mt towing, no hi speed towing, no OD towing. the tranny is a rebuilt 700R4 and a 3.42 axle *3= .030 over means the bore was increased from 4.001 to 4.030, .010/.010 under means the rod and main journals have been turned down from the 2.1/2.45" stock numbers. GM has specced the proper limits for over bore/under turned motors for appx 35 years on the 'large journal' 350, of which the 4.3 is 3/4 of. We can either a) assume recon did the rebuild properly, or b) I am willing to purchase the parts to remove the heads, pull each journal, mic them, get the oil clearance and reinstall the heads making sure proper sealant is used to do the best to eliminate coolant leaks. I will even verify taper and ring gap. your call. So how about it? This could be an everyone wins situation. Everyone will get to see the behaviour of the oils they select, ditto filters, ditto air filters. At the end, the teardown will grade the effort. This will be the closest approximation of mobils daily testing that any 'citizen' has ever undertaken. Can I get everyone on board? Or shut up and be quiet?