Recent Topics
Cut Open - Toyota 90915 = yzzf2
by JC1
04/23/14 08:31 PM
Cut Open - Purolator Classic L20195
by JC1
04/23/14 08:29 PM
Cut Open - Purolator Pure One PL20195
by JC1
04/23/14 08:28 PM
Cut Open - Napa Gold 1516
by JC1
04/23/14 08:27 PM
Cut Open - Napa Gold 1334
by JC1
04/23/14 08:26 PM
Carbon Fibre Trim
by domer10
04/23/14 08:24 PM
Bosch D+ D3334 Cut Open
by Bookmaker
04/23/14 08:11 PM
2000 Chevy Astro Issues 2WD
by actionstan
04/23/14 08:07 PM
What ingredient makes it "Death"-Cool?
by Nayov
04/23/14 08:06 PM
Moving, BITOG style...
by 01rangerxl
04/23/14 07:51 PM
Bosch D+ D3410 Cut Open
by Bookmaker
04/23/14 07:39 PM
Good Alternative to Suzuki Super Grease "A"
by ABCarr
04/23/14 07:34 PM
Newest Members
BMWR1200GS, Npeters1205, shrekulo, Helpme, and111
49679 Registered Users
Who's Online
116 registered (asand1, b1amgm47, 72te27, 2010_FX4, 77GrandPrix, 13 invisible), 2105 Guests and 169 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49679 Members
64 Forums
212341 Topics
3328625 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