Recent Topics
klotz super techniplate feed back
by mcn1970
09/30/14 10:58 PM
ISIS appears 5 miles from Baghdad
by dave1251
09/30/14 10:34 PM
ML-The Silent Danger of Abrupt Lubricant Failure
by wemay
09/30/14 10:15 PM
Apple releases important update
by Mystic
09/30/14 09:56 PM
Machinery Lubrication - 'GrpIII syn is mktng term'
by wemay
09/30/14 09:41 PM
The Paint is Peelin'!
by Nick1994
09/30/14 09:39 PM
Pennzoil Syn Blend Or Yellow Bottle 5w30 ?
by crazyoildude
09/30/14 09:29 PM
fram ultra, weird oil pressure
by bowhuuntr
09/30/14 09:27 PM
Electric dryer tripping breaker
by NateDN10
09/30/14 09:22 PM
Oil Recommendation - 1996 Grand Marquis
by AjsGarage
09/30/14 09:11 PM
PQIA- Pennzoil Platinum Pure Plus
by vinu_neuro
09/30/14 08:46 PM
Fram TG vs Ultra?
by Camprunner
09/30/14 08:46 PM
Newest Members
mcn1970, KCChemist, bbuice, Hemingway, kcp
51459 Registered Users
Who's Online
88 registered (901Memphis, 01rangerxl, AdRock, 1 FMF, 2004tdigls, AjsGarage, 3 invisible), 1320 Guests and 173 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51459 Members
64 Forums
220057 Topics
3474790 Posts

Max Online: 2862 @ 07/07/14 03:10 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