Recent Topics
Could this be as good as last year?
by John_K
04/24/14 01:47 PM
Road trip to Palo Duro Canyon?
by Benzadmiral
04/24/14 12:42 PM
Pork Brine!
by 123Saab
04/24/14 09:57 AM
Water in Gas
by outoforder
04/24/14 09:12 AM
Valve job pics
by Stelth
04/24/14 09:01 AM
2000 Yamaha V-Star Mobil Delvac 15w40 @ 3000 miles
by outoforder
04/24/14 08:58 AM
Adding SSD to a 6-year-old desktop?
by Quattro Pete
04/24/14 08:37 AM
Laptop hard drive
by Oldmoparguy1
04/24/14 08:11 AM
carquest 5w30 full synthetic
by waltywalt
04/24/14 08:03 AM
Summer Car - start up
by 2stroker
04/24/14 07:59 AM
Small engine, PCMO or HDEO?
by supercity
04/24/14 06:50 AM
please explain twin hammer vs twin clutch impacts
by Donald
04/24/14 06:49 AM
Newest Members
2stroker, BMWR1200GS, Npeters1205, shrekulo, Helpme
49680 Registered Users
Who's Online
91 registered (90crvtec, 99Saturn, 440Magnum, 901Memphis, actionstan, 123Saab, 8 invisible), 2062 Guests and 181 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49680 Members
64 Forums
212360 Topics
3329125 Posts

Max Online: 2651 @ 04/21/14 04:38 PM
Donate to BITOG

Page 20 of 20 < 1 2 ... 18 19 20
Topic Options
#130424 - 05/01/05 04:11 AM Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
moribundman Offline


Registered: 06/02/03
Posts: 23591
quote:
Well, would 75 in a minivan climbing the mountains of central PA on I-80 qualify??
Absolutely! [Smile]

Top
#130425 - 05/01/05 05:44 AM Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
427Z06 Offline


Registered: 12/06/03
Posts: 7409
Loc: Austin, TX
quote:
Originally posted by 427Z06:
When testing a non-friction modified 15w40 HDEO and a friction modified dino 5w20 in particular engines, my experience has been that when they have non-friction modified 15w40 HDEO in them, they reached operating temperature is less time. My guess is, they were burning more fuel to maintain the same idle and moderate acceleration levels, thus the engines were generating more heat.

I just like to add to this, that once up to temperature, the friction modified dino 5w20 stabalized at a lower temperature than the non-friction modified 15w40 HDEO under moderate driving conditions.

Top
#130426 - 05/01/05 01:06 PM Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
mechtech Offline


Registered: 08/11/04
Posts: 2387
Loc: Chicago area
Dr.A - Just because the pressure is the same doesn't necessarily mean that one oil is thinner/thicker/the same, than the other. The pressure gauge reads from the pump and relief valve operation, and the oil may be thinner at the cams, rings, bearings, where heat and pressure have great effect.

Top
#130427 - 05/01/05 06:31 PM Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
AEHaas Offline


Registered: 01/09/05
Posts: 1312
Loc: Sarasota, Florida
If the oil leaves the sump at 180 F and maybe picks up 10 degrees on its way to the bearing it would be at 200 F at the entrance to the bearing. If if then picked up 50 F there it would end up at 250 F.

The thicker oil starts out at 240 F at the sump, picks up 10 and then 50 more through the bearing. It ends up at 300 F.

aehaas

Top
Page 20 of 20 < 1 2 ... 18 19 20