Recent Topics
F1 - 2015 Abu Dhabi Grand Prix
by gofast182
12 minutes 29 seconds ago
Mobil 1 HM 5w30, 8100mi, 99 Civic 213k
by InvalidUserID
17 minutes 58 seconds ago
British DNA Collection...
by Shannow
31 minutes 17 seconds ago
Hawk 'Quiet Slot' rotors?
by dailydriver
32 minutes 51 seconds ago
Pennzoil HM stopped a leak
by Jake777
38 minutes 43 seconds ago
Wix 51515 Cut Open. After 400KM. Sludge Alert.
by Farmer
42 minutes 20 seconds ago
Tires-Pirelli, Michelin, or Continental
45 minutes 21 seconds ago
WestWay Lubricants?
by Brit33
Today at 04:33 PM
Good Texans
Today at 04:28 PM
Bourbon/Rye - what to buy.
by Shannow
Today at 03:43 PM
Small crack in crankcase
by philipp10
Today at 03:35 PM
Stripped plastic in Briggs carb
by MoreCowbellAz
Today at 03:32 PM
Newest Members
Mortamer, adama, dwilliamgum, HuggerOrange, KarlZ28
56124 Registered Users
Who's Online
100 registered (97tbird, 87sammy, 2015_PSD, AdmdeVilleneuve, 97K15004WD, 12 invisible), 1516 Guests and 139 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
56124 Members
66 Forums
241060 Topics
3905152 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
Well, would 75 in a minivan climbing the mountains of central PA on I-80 qualify??
Absolutely! [Smile]

#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
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.

#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.

#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: 1321
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.


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