Automakers Lengthen Oil Change Intervals
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From: Brent P on 29 Mar 2007 11:18 In article <y6QOh.5631$B25.5278(a)news01.roc.ny>, Mike wrote: > > "Brent P" <tetraethylleadREMOVETHIS(a)yahoo.com> wrote in message > news:3pOdnSmtV-AQ15bbnZ2dnUVZ_orinZ2d(a)comcast.com... >> In article <35mdnf-ezp432pbbnZ2dnUVZWhednZ2d(a)giganews.com>, Steve Barker >> wrote: >>> Wrong, just Wrong. >> >> In which universe? Not in this one. >> >> Here's a hint... oil coolers use the coolant to cool the oil. > Wrong again Bret. Transmission coolers use the coolant in the radiator to > cool. All the engine oil coolers I have ever seen were air cooled regardless > of manufacturer. That should have read some oil coolers, but your exposure being limited is not my problem. Here's an oil cooler from police package crown vic: http://www.p71interceptor.com/oilcooler/index.html Not to mention the much lighter duty version also shown on the same page.
From: SMS on 29 Mar 2007 11:51 C. E. White wrote: > ----- Original Message ----- > From: "Steve Barker" <ichasetrains(a)some.yahoo.com> > Newsgroups: > alt.autos.ford,alt.autos.nissan,alt.autos.toyota,alt.trucks.ford,rec.autos.driving,rec.autos.makers.ford.explorer,rec.autos.tech > Sent: Wednesday, March 28, 2007 10:06 PM > Subject: Re: Automakers Lengthen Oil Change Intervals > > >> I run it year 'round in Kansas. Still no problems. There's just not >> that much difference, except the 30w lubes better hot. > > Why do you say that? Back in the 70's multi-weight oils got a bad > reputation becasue some of the early 10W40 oils tended to break down > and in some cases you ended up with some sort of goop in the engine. > That was long ago. Modern API certified 5W30 and 10W30 oils have never > had that sort of problem. At normal "high" oil operating temperatures > (around 100 degrees C), straight 30 weight Havoline has a viscosity of > 10.3 cSt. while both 5w30 and 10w30 Havoline have a viscosity of 9.7 > cSt - less than 6% different (the acceptable range for 30 weight oil > is 9.3 to 12.5 cSt). At 40 degrees C (104 F), the straight 30 weight > has a viscosity over 80 cSt while the 5W30's viscosity is less than 60 > cSt (both are still far thicker than either oil at 100 C). During a > normal cold start straight 30 weight oil is much thicker than 5W30 > oil - not a good thing. Once an engine is warmed up, the 5W30 and > straight 30 weight have to meet the same viscosity requirements. So > where is the advantage of straight 30 weight oil? 1. It's a little cheaper. 2. The wider the range between the two viscosities, the more viscosity modifiers and the less base stock in the oil. However it's not really worth the significant extra wear at start-up to use straight 30 weight. Not if you care about getting very long engine life.
From: jim on 29 Mar 2007 13:05 Mike wrote: > > "John Henderson" <jhenRemoveThis(a)talk21.com> wrote in message > news:570njeF2bipsiU1(a)mid.individual.net... > > jwardl wrote: > > > >> How can oil be changed TOO often? Personally, think I'll stick > >> with 3/3k. > > > > Because there's more wear with new oil than with moderately > > stressed oil. > > Got any proof to back up that claim ? I have to call bullshit on that one, > it doesn't even make sense. > If it made any sense to him he would buy my barrel of "moderately stressed oil" -jim > > > > If the lab results were different, I'd be changing my oil more > > frequently. At some point, you've got to go with the evidence > > and leave the fairy stories and wishful thinking behind. > > > > John ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =----
From: C. E. White on 29 Mar 2007 12:44 "Mike" <mik(a)localnet.com> wrote in message news:y6QOh.5631$B25.5278(a)news01.roc.ny... > Wrong again Bret. Transmission coolers use the coolant in the > radiator to cool. All the engine oil coolers I have ever seen were > air cooled regardless of manufacturer. Not true at all. I've seen both kinds. The Ford Crown Vic police package includes a water to oil engine oil cooler. Both types are available after market as well Here is an air to oil type - http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=1878 Here is an water to oil type - http://www.focussport.com/cosworth-oilcooler.htm And there air to oil and water to oil transmission coolers as well. Ed
From: C. E. White on 29 Mar 2007 12:52
"SMS" <scharf.steven(a)geemail.com> wrote in message news:460be075$0$27179$742ec2ed(a)news.sonic.net... > 1. It's a little cheaper. What is a little cheaper? Havoline 5w30 is $1.55 per quart at Advance Auto. Havoline straight 30 weight is $1.45 per quart. $0.50 per oil change doesn't seem significant, but I guess it is a little cheaper as you said. > 2. The wider the range between the two viscosities, the more > viscosity modifiers and the less base stock in the oil. While this might be true if you wait long enough or over stress the oil, is it true in a practical sense? I let my Saturn Vue go for 7000 miles between changes once. I had the oil analyzed and it still met the specs for a 5W30 oil. > However it's not really worth the significant extra wear at start-up > to use straight 30 weight. Not if you care about getting very long > engine life. Agreed - particularly if you are in a cold climate. Ed |