for the guys that are into recreational oil changing...
in [Technical]
|
From: clare on 4 Apr 2010 18:10 On Sun, 04 Apr 2010 12:49:44 -0400, Bill Putney <bptn(a)kinez.net> wrote: >clare(a)snyder.on.ca wrote: > >> Actually, even if blowby was at the root of the problem (which it >> wasn't on the Toyotas and 3.7 Mopars)... > >I think you meant 2.7 Mopars there. Yes, fat finger syndrome.
From: clare on 4 Apr 2010 18:14 On Sun, 4 Apr 2010 11:57:24 -0500, "hls" <hls(a)nospam.nix> wrote: > ><clare(a)snyder.on.ca> wrote in message >> Actually, even if blowby was at the root of the problem (which it >> wasn't on the Toyotas and 3.7 Mopars) synthetic oils do not oxidize as >> easily - meaning the acids etc deposited by the blowby would not break >> down the synthetic as fast. >> >> Would it eliminate the problem? Doubtful - but it would definitely >> REDUCE the problem -or delay it. > >Would they oxidize as easily, or not? Prove your point. They would not oxidize as easily as the "dyno" oil, but if blowby by-products are causing the problem the improvement from using Synthetic - although real, would be insignificant in the grand scheme of things. Synthetic oil will not "repair" the engine. The synthetic would last longer than the dyno oil under the same circumstances - but the Dyno oil would last even longer in an engine without excessive blowby. And yes, the synthetic would likely last even longer than the dyno under the same (better) conditions.
From: clare on 4 Apr 2010 18:18 On Sun, 4 Apr 2010 12:01:17 -0500, "hls" <hls(a)nospam.nix> wrote: > ><clare(a)snyder.on.ca> wrote in message >news:r9ghr55t8btmimd0s9a1ki9q8n1t72tbnf(a)4ax.com... >> On Sun, 4 Apr 2010 08:05:22 -0500, "hls" <hls(a)nospam.nix> wrote: >> >>> >>>"jim beam" <me(a)privacy.net> wrote in message >>>news:Cq-dnaDhIbm58yrWnZ2dnUVZ_v4AAAAA(a)speakeasy.net... >>>> On 04/02/2010 07:47 AM, ACAR wrote: >>>> <snip for clarity> >>>>> Toyota's oil related sludge/gelling issues were pretty well >>>>> publicized. However, I think it is true that not one problem was cited >>>>> by anyone who changed their own oil. >>>> >>>> that statement is worth significant examination: "sludge", any engine, >>>> is >>>> an oil problem, not mechanical. if toyota had been sold a job lot of >>>> defective oil or if iffy-lube were being more ruthlessly inattentive >>>> than >>>> normal, that would indeed cause the problem. >>>> >>> >>>So you are trying to say that the problematic Toyotas would not have >>>sludged if they had been using synthetic oils? I doubt you have any >>>proof at all for that statement. >>> >> He is correct though - synthetic oils at the recommended interval did >> not sludge - nor dird regular oils at the severe duty schedule. >> That has been proven time and again. > >Toyota, which does not have a recommendation for synthetics in my book, >claims that the problems were that the owners did not maintain their >vehicles >properly. There is evidence that there was more to it than that (PCV >system modifications). > >I have seen no data with regard to synthetics in the problematic runs >of Toyotas. Have you actually SEEN the data, and can you cite your >source? MY source is a couple mechanics who work at the local Toyota dealerships. They have not had a SINGLE coked engine failure on vehicles following the severe service schedule, or using synthetics on the standard schedule. Same with mechanics at the local Mopar dealership. And they had a LOT of problem engines using the specified standard oil on the "normal" change schedule. The problem is obvious - the oil not being changed often enough for conditions. This is NOT to say there was not a problem with the engine design that made the operatring conditions for the oil more onerous than they needed to be.
From: clare on 4 Apr 2010 18:27 On Sun, 04 Apr 2010 14:46:17 -0400, Tony Harding <tharding(a)newsguy.com> wrote: >On 04/04/10 12:01, Scott Dorsey wrote: >> hls<hls(a)nospam.nix> wrote: >>> >>> So you are trying to say that the problematic Toyotas would not have >>> sludged if they had been using synthetic oils? I doubt you have any >>> proof at all for that statement. >> >> Well, if the problem was caused by low flow and high temperatures causing >> oil breakdown, a synthetic oil with a higher breakdown temperature would >> seem to help. >> >> I had a Chrysler Laser which was notorious for turbocharger problems. The >> oil would bake in the turbocharger after the engine was turned off, and >> clog it up with varnish. > >Sounds like a candidate for an electric fan to run after the engine was >shut off. Or just learn to drive the turbo properly - NEVER come in off a hard run and shut the engine off. ALLWAYS give the turbo a "cooldown period" - either gentle driving for several blocks or a couple minutes at idle before shutdown. The electric fan wouldn't help at all. An electrically operated oil circulation pump and/or coolant circulation pump would work.
From: jim beam on 4 Apr 2010 18:30
On 04/04/2010 03:27 PM, clare(a)snyder.on.ca wrote: > On Sun, 04 Apr 2010 14:46:17 -0400, Tony Harding > <tharding(a)newsguy.com> wrote: > >> On 04/04/10 12:01, Scott Dorsey wrote: >>> hls<hls(a)nospam.nix> wrote: >>>> >>>> So you are trying to say that the problematic Toyotas would not have >>>> sludged if they had been using synthetic oils? I doubt you have any >>>> proof at all for that statement. >>> >>> Well, if the problem was caused by low flow and high temperatures causing >>> oil breakdown, a synthetic oil with a higher breakdown temperature would >>> seem to help. >>> >>> I had a Chrysler Laser which was notorious for turbocharger problems. The >>> oil would bake in the turbocharger after the engine was turned off, and >>> clog it up with varnish. >> >> Sounds like a candidate for an electric fan to run after the engine was >> shut off. > Or just learn to drive the turbo properly - NEVER come in off a hard > run and shut the engine off. ALLWAYS give the turbo a "cooldown > period" - either gentle driving for several blocks or a couple minutes > at idle before shutdown. s.o.p. on semi's and large machinery. > The electric fan wouldn't help at all. An > electrically operated oil circulation pump and/or coolant circulation > pump would work. -- nomina rutrum rutrum |