Recent Topics
01 Ford 350 5.4 - Which Thermostat?
by Miller88
02/28/17 10:46 AM
Winter Tires for Heavy Trucks in North America?
by SubLGT
02/28/17 10:45 AM
1998 CBR 600 F3
by Letsrunum
02/28/17 10:41 AM
Pennzoil rebate question?
by Dumc87
02/28/17 10:35 AM
Still unable to login to bank account
by motor_oil_madman
02/28/17 10:02 AM
Pontiac Fiero 2M4 5 speed 2.5L
by Letsrunum
02/28/17 09:33 AM
Please help
by kinch1
02/28/17 08:30 AM
Electric preshave
by cjcride
02/28/17 08:19 AM
Was gifted some old brandy yesterday
by Klutch9
02/28/17 07:53 AM
AEM Dryflow or OEM
by Joeforester
02/28/17 03:55 AM
MY13 XT Forester Penrite Enviro+ C3 5W30
by mickjf
02/28/17 02:07 AM
4th to reverse
by mjoekingz28
02/28/17 12:41 AM
Mortise lock cylinder help
by boulderdentist
02/28/17 12:15 AM
Very pleased with online seller for filters-
by rubberchicken
02/27/17 11:47 PM
New Lucas Oil Stabilizer High Mileage
by mrfd222
02/27/17 11:38 PM
Oil filter with no bypass valve ?
by rubberchicken
02/27/17 11:10 PM
Gear Oils for a FJ Cruiser
by Nick1994
02/27/17 10:50 PM
275,000 Mile 2005 motor... which oil?
by Goros
02/27/17 09:54 PM
Kitchen cabinet re-lacquer
by spasm3
02/27/17 09:42 PM
2013 Civic Si (K24Z7) Oil for Extended OCI
by cjsiege
02/27/17 09:30 PM
Newest Members
AngieGM, EscapeVelo, 327, cjsiege, Goros
60673 Registered Users
Who's Online
78 registered (andrewp1998, 2012AccentSE, 4WD, anoilgirl, Alfred_B, 12 invisible), 2116 Guests and 15 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
60673 Members
66 Forums
261681 Topics
4317544 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#27616 - 05/20/03 11:27 AM 10w30 in the summer, 10w40 in the winter? Is that ok?
billyman Offline


Registered: 05/20/03
Posts: 1
Loc: Nashville, TN
I have been changing my own oil since 1988 (18 y/o w/a 1979 Chevy Van). Then I went to a '90 Cavalier Z24, then a '94 Gran Prix, then a '90 240SX, '01 Olds Alero and now a '00 Max.

All this time I have been of the mindset: 10W30 in the winter, 10W40 in the summer. Living in TN, I always liked the thought of offering better protection by switching to the thicker oil in the summer.

Should I continue this practice? Or modify it? You thoughts & comments please.

Thanks in advance.

[ May 21, 2003, 02:28 AM: Message edited by: billyman ]

Top
#27617 - 05/20/03 12:06 PM Re: 10w30 in the summer, 10w40 in the winter? Is that ok?
Dominic Offline


Registered: 07/04/02
Posts: 1844
Loc: Gilbertsville, PA
I don't see the advantage of such a practice so long that the 30 is enough viscocity. You don't want too little or too much, and only an analysis can tell you whether a 30 or 40 is better for summer/winter.

I run 10W-30 no matter what right now. I have heard running 10W-40 can cause a car to never run right on 10W-30 later on, but again these are rumors and are not likely true [Smile] Looking at your situation, it appears they aren't at least.

Top
#27618 - 05/20/03 12:20 PM Re: 10w30 in the summer, 10w40 in the winter? Is that ok?
Flimflam Offline


Registered: 01/18/03
Posts: 453
Loc: Galveston, TX
quote:
Originally posted by Dominic:


I run 10W-30 no matter what right now. I have heard running 10W-40 can cause a car to never run right on 10W-30 later on, but again these are rumors and are not likely true [Smile] Looking at your situation, it appears they aren't at least.

From 1999 to mid- 2002, I used 10w-40 regardless of season or weather, regardless hot or cold. From mid-2002 to December 2002, I used straight grade HD-30 mineral oil in hot summer weather and 5w-30 in cold winter weather. For my next oil change, I will pour in either 10w-30 or 10w-40. My car is 38,500 miles and 4 1/2 years old.

Top
#27619 - 05/20/03 01:55 PM Re: 10w30 in the summer, 10w40 in the winter? Is that ok?
Patman Offline



Registered: 05/27/02
Posts: 19588
Loc: Oakville, Ontario
I would say pick a good 5w30 or 10w30 synthetic and stick with it year round. No need for 10w40 with your car, the clearances most likely are tight enough that 40wt oil is too thick for best engine wear.

Top
#27620 - 05/20/03 10:33 PM Re: 10w30 in the summer, 10w40 in the winter? Is that ok?
troy_heagy Offline


Registered: 07/31/02
Posts: 179
Loc: Forest Hill MD
quote:
Originally posted by billyman:
10W30 in the winter, 10W40 in the summer.

Tennessee has winter?!?!? You could probably run 10W-40 all year round. Just make sure it's a synthetic.

Top