And if it DOESN"T specify a weight, then what?

JFTM!
But not the weight. You know, those big charts above.Seems pretty clear which oil to use according to that manual.
Engineers write manuals, "marketers" don't. The engineers know all about the relationship between oil viscosity, MOFT and wear. It's CAFE that forces them to "recommend" the thinnest oil possible without causing engine warranty claims.Those engineers that designed don't know diddly squat, the people that wrote the manuals are just marketers, and we know best because we read the MSDS for a trillion brands and make W... A.. Guesses.
Car manufacturer's aren't effected by CAFE ? ...Well Mr. Measureman,
It seems like a lot of people here seem to think they know better than the engineers that designed the cars. They will also use CAFE requirements to back up their claims and think that the auto manufacturers are out to get us all for better mpg figures. Lots of tin foil hat wearers![]()
#2 is hard for some people because it's marked with the number 710 instead of clearly saying OIL.#1. A lot of people cannot read or even know what or where their owners manual is.
#2. Many people don’t even know where the oil cap is.
How were they different? I am interested.But not the weight. You know, those big charts above.
BTW, I had a 229.6 in 5W-30, and a 229.5 in 5W-40 in it so far. It likes the 5-40 better.
BEVO list. Your only choices are 0/5W - 30/40. Many brands to choose from (well, not for 229.6 yet, but give it some time). Easy peasy. Pick your weights by temp, then pick something on the list that is available and strikes your fancy.And if it DOESN"T specify a weight, then what?
JFTM!
Tongue in cheek Z. I go by the manual.Engineers write manuals, "marketers" don't. The engineers know all about the relationship between oil viscosity, MOFT and wear. It's CAFE that forces them to "recommend" the thinnest oil possible without causing engine warranty claims.
Mercedes-Benz is wisely not listing acceptable grades for some approvals. Considering that the approval requires a minimum HT/HS that makes the grade irrelevant.But not the weight. You know, those big charts above.
BTW, I had a 229.6 in 5W-30, and a 229.5 in 5W-40 in it so far. It likes the 5-40 better.
Me too! They were both Ravenol brands, FDS and VST, but the VST is very different with no apparent loss of fuel economy.How were they different? I am interested.
I see a lot of posts asking what weight oil should I use.
Isn't that stamped on just about every oil fill cap?
Or in the owners manual.
Of course there are exceptions like real old cars or odd ball cars but very few drive those
If the specified oil viscosity was actually from the people who designed & tested the motor you would have a very solid point. any amount of testing, research, or speculation I can do as a mechanic pales in comparison to what the manufacturer does in developing a new engine.Those engineers that designed don't know diddly squat, the people that wrote the manuals are just marketers, and we know best because we read the MSDS for a trillion brands and make W... A.. Guesses.
From memory don't some Kia's say to use Quaker State oil that is A5/B5, which doesn't exist.If we have to use what’s either stamped on the oil cap or what’s written in the manual, I guess I have to start going to the Honda dealership and use only “Genuine Honda Motor Oil” or else I’ll ruin my motor?![]()
I’m thinking you’re correct. QS was listed as the oil to use in the owner’s manual. And all the Volkswagens and Audis I’ve seen have “Castrol” stamped on the oil fill cap.From memory don't some Kia's say to use Quaker State oil that is A5/B5, which doesn't exist.
Honda oil comes from Honda oil wells so yes use Honda oil. You tires will last longer.If we have to use what’s either stamped on the oil cap or what’s written in the manual, I guess I have to start going to the Honda dealership and use only “Genuine Honda Motor Oil” or else I’ll ruin my motor?![]()