View Full Version : engine oil.
mactor33
11-10-2009, 07:06 PM
cold days i buy 5w30
summer days i buy 10w30
what is the diff between 10w30 and 10w40?
i accidentally grabbed the 10w40--'
and is it ok if i use it?
NoisufnoC
11-10-2009, 07:19 PM
i google this it sounds right
It is a measurement of how quickly a certain amount of oil flows thru a small opening at a particular temp. The first number is a measurement at a cold temp and the second (30,40,50) is a measurement when it is much warmer. So, 40 is a bit thicker than 30 when it is warmer.
Mix single 10W-40 quart/litre with four (4) 5W-30 ones in the summer and you should be OK.
Pool Playen Bob
11-10-2009, 08:06 PM
5w-30 year round. i never swap it up. idk why.
Klint
11-10-2009, 08:09 PM
All you need is 5w-30. You don't need any weight more than that.. that was in the old days.
mactor33
11-10-2009, 08:17 PM
Mix single 10W-40 quart/litre with four (4) 5W-30 ones in the summer and you should be OK.
if ever i don't mix it up? will it be ok to drive?
NoisufnoC
11-10-2009, 08:27 PM
yeah u will be fine. just u shouldnt keep mixxing oils like u do its not recommended
just u shouldnt keep mixing oils like you do. Its not recommended 5W-30 Winter & 10W-30 summer is fine.
if ever i don't mix it up? will it be ok to drive? On a higher mileage car in the summer, you'd be OK. If I remember correctly, 5W-40 was the spec for the Lotus Elise.
i never swap it up. idk why.Maybe because you drive in So. Dakota.;)
You don't need any weight more than that.. that was in the old days. If you read the Owners Manual, 10W-30 valid for 0F+.
NoisufnoC
11-10-2009, 09:16 PM
so this is acually a good thread. so would it be better to switch like he does?
Celi Blanco
11-10-2009, 09:49 PM
so this is acually a good thread. so would it be better to switch like he does?
Its not necessary to switch, 5W will give you quicker starting in winter (or when the engine is cold) and quicker protection (it pumps easier at low temps) and works fine in summer for the few moments that the engine is cold.
Once the engine is warmed up (regardless of it being winter or summer) the 30 or 40 rating is dominant, so the 30 weight will protect just fine (with modern oils, this was not true in the seventies which is why on my old Lotuses the factory spec was 20W50) but the 40 weight will cost you a tiny bit of horsepower and fuel economy, for a very small promise of slightly better resistance to being squeezed out between engine parts.
Lotus has a thicker oil speced because they assume abusive driving behavior and have had a long history of engine wear complaints (according to a former Lotus employee I knew very well) with previous non Toyota engines.
NoisufnoC
11-10-2009, 09:55 PM
ill stick with the rp 5w30 my baby deserves it after being abused for so long
GSBoek
11-11-2009, 04:01 AM
i accidentally grabbed the 10w40--'
and is it ok if i use it?For summer yes, you'll be fine until your next oil change.
ill stick with the rp 5w30 my baby deserves it after being abused for so long The 5W-30 will clean better. But, I would assume that you would be fine w/the 10W-30 in the high Nevada heat of summer.
NoisufnoC
11-11-2009, 06:37 PM
thanks 2way
lilirish
11-11-2009, 07:03 PM
i have read through all of the posts on this and on the only one that comes close to the truth is Celi Blanco and Noisufno. the first number is for when the temp is 32- for the cold states and the next number is for +32. you dont wanna change the weight of the oil because you change your oil pressure. the heavy weight of the oil will cause premature wear on the oil pump. and the oil pump is not greatest thing to try to replace. the oil pressure comes from your bearing clearances. the clearances for the mains are 0.0011-0.0024 in for the 1zz. 2zz 0.0011-0.0020 in. now think about this that is a very tight fit that your trying to force thicker oil through that is used on older like the 80s vehicles. dont think you would wanna do that
now think about this that is a very tight fit that your trying to force thicker oil through that is used on older like the 80s vehicles.What are you talking about?? The 10W-40? Because, 10W-30 is a valid oil for use in a 1ZZ/2ZZ.
Pool Playen Bob
11-11-2009, 07:17 PM
Maybe because you drive in So. Dakota.;)
calling me an inbreed hick? saying i'm hung like a buck gerbil? :AF:
:D :love:
ateens4
11-11-2009, 10:28 PM
its fine, when i first got my car, my dad put 10w-40 in it, went fine. then finally got mobil clean 5000 in it after 5 months with the 10w-40
EMSRacerCeli03
11-11-2009, 11:11 PM
what would you recommend for arizona heat? i been using 5w-30 as recomended could i use something else since of the heat here?
Celi Blanco
11-11-2009, 11:43 PM
what would you recommend for arizona heat? i been using 5w-30 as recomended could i use something else since of the heat here?
That is fine, your cooling system keeps the engine below the temperature where oil breaks down. If you are really concerned then switch to a synthetic oil.
EMSRacerCeli03
11-12-2009, 12:20 AM
i use Royal Purple anyways could i use a different weight
calling me an inbreed hick? saying i'm hung like a buck gerbil?Nothing of the kind. Merely a reference to the lack of high temps in your region.
could i use a different weight You could. Especially, if you do alot of highway in the summer.
yoldash
11-12-2009, 09:26 AM
Different from you guys. I live in turkey and here dealers recomend 0-30 for celica but I dont know why but they say better cooling
EMSRacerCeli03
11-12-2009, 09:45 AM
You could. Especially, if you do alot of highway in the summer. like 0-30?
R I C H I E
11-12-2009, 02:05 PM
I always use 10w-30. No problems so far.
fabez14
11-12-2009, 04:04 PM
ive been using 10-30 as well with no issues
like 0-30Huh??? no... that's a low temp oil... for north of the border;)
JameX
11-12-2009, 09:25 PM
Just switched to castrol Edge 5w-30 and added half bottle of Liqui Moly Mos2 (I like my Moly) althought Edge already has some moly in it. 2way are you doing well with Edge? Seen its a fairly new oil in the US still havent seen any UOA's out there. I guess whenever its OCI i will do a UOA with blackstone and post.
2way are you doing well with Edge? Seems OK. I haven't done any UOAs. I am getting pretty consistent VVT startup noise, though. Not sure if it is related to the Edge or not. Otherwise, valvetrain is quieter vs. Syntec. My MPG has gone down..... but, my commute has changed and I hit more traffic/stop&go.
I guess whenever its OCI i will do a UOA with blackstone and post. nice :thumbup:
GSBoek
11-13-2009, 04:44 AM
I have to check if the Edge has hit the stands here already. My guess is not. I'm still using GTX 10W40 in the Celica and 20W50 in the Crown.
JameX
11-13-2009, 05:21 PM
Seems OK. I haven't done any UOAs. I am getting pretty consistent VVT startup noise, though. Not sure if it is related to the Edge or not. Otherwise, valvetrain is quieter vs. Syntec. My MPG has gone down..... but, my commute has changed and I hit more traffic/stop&go.
nice :thumbup:
Maybe VVT-i Gear?
Gsboek had the same problem didn't he? I think he changed it and noise was gone. I know he posted a few pics describing the problem. Maybe he can chime in.
scarface
11-13-2009, 06:00 PM
Yea I was wondering myself I:ve used 5w50 mobil 1 syn for a while seems to be good.
Whats best synthetic to run if drive at high speeds and rev happy?
Maybe VVT-i Gear?
Gsboek had the same problem didn't he? I think he changed it and noise was gone. I know he posted a few pics describing the problem.Yep. I was involved in that thread. I'm probably due for a new VVT ass'y.
I have to check if the Edge has hit the stands here already.Do you get the UK, EU, or US versions of Castrol?
JameX
11-13-2009, 08:41 PM
Yep. I was involved in that thread. I'm probably due for a new VVT ass'y.
Do you get the UK, EU, or US versions of Castrol?
So the VVT-i gear problem involves only annoying startup noises? Or it degrades to some mechanical damage or problems?
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