is 5W30 the new 10W30

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0w-30 is more universal in my opinion but the cost is higher as it is available only as synthetic. Eventually, 0w-20 will be the standard.
 
You cant believe how many people cringe when you tell them that 0w20 is Toyota's newest fave oil.They just cant believe it would last any length at all. At least its thin enough to slide past any sludge issues.....
 
Yes.
Inexpensive, widely available and recommended for a huge range of engines.
Most twenty grade engines would be fine with a 5w30, although warranty is another matter.
Any engine for which a 10w30 is recommended should be fine on a 5w30 as well.
I've come around to the view that the only reason to use 10w30 over 5w30 is that you got the 10w30 dirt cheap.
This is why I still use some 10w30.
 
If the 10w30 is also ACEA A3/B4 it COULD perform better for towing or load hauling than the 5w30 ILSAC GF5 "fuel economy" bent lubes. Most oil blenders are paying no attention to their 10w30 as its not spec'd much for light trucks and vans as it once used to be. Amsoil ATM comes to mind as a tough as nails PAO real synthetic for light trucks that see good use. GC used to be too.
 
It has been for some time now. With many cars using 20 weight oils and the rest of the majority 5w30 , it is easier to use a 5w30 as a "universal fill". Most of the shops I deal with on a daily basis have gone to 5w30 as their bulk container oil. Although it is still common to find people still using 10w30 and 10w-40 for all applications too.
 
Huge numbers of European cars are specced for 5w30 oils.

Castrol actually do a 5w30 Magnatec A3/B3/B4 specifically for Vauxhall.cars.

Volvo and Ford spec 5w30 in most models. Though you can gor for a 0w30 if you like.

Plenty of Ford and Volvo cars doing huge fleet mileages with 5w30 in A1/B1 A5/B5 oils.

I have been looking at Chevron Supreme 5w30 A5/B5 recently.in Costco. As if I start putting big miles on my Volvo I might consider 7500 mile changes with that.

£44 for 20 litres =£2.20 a litre for oil or £12:10 an OCI.

£26 for 4 litres of Castrol Magnatec = £6:50 a litre.

And £35:75 an OCI.
 
In would say that 5W30 was universal oil throughout 2000's and now it's being replaced by 5W20, at least in USA.

I don't have a problem with it, as most used 5W30 oils are really 10W20 oils at the 2000-3000 miles mark.

I still believe, 1% of drivers cam benefit from 10W30 and higher viscosity, even if 5W30 or 5W20 are specified.
 
I'm guessing this means 10W40 is no longer in vogue?
shocked.gif
 
He he, Stephen_G, my dad had essentially "banned" 10w-40s and straight grades from his shop by the early 1970s.
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Plus, he hated short, wasteful OCIs. I used some straight 30 I found languishing about somewhere in some summer OPE application (for which it was allowed in the manual) and he darn near had a stroke. When I considered 10w30 HDEO for my oil burning LTD, he told me I was nuts, and to stick to a sensible fuel conserving grade, as they were known at the time.

He and CATERHAM must have met each other a long time ago or be long lost brothers. I thought my dad might question a bit when 5w-20 came out for the Fords, but he didn't even blink.
 
Originally Posted By: Garak
He he, Stephen_G, my dad had essentially "banned" 10w-40s and straight grades from his shop by the early 1970s.
wink.gif
Plus, he hated short, wasteful OCIs. I used some straight 30 I found languishing about somewhere in some summer OPE application (for which it was allowed in the manual) and he darn near had a stroke. When I considered 10w30 HDEO for my oil burning LTD, he told me I was nuts, and to stick to a sensible fuel conserving grade, as they were known at the time.

He and CATERHAM must have met each other a long time ago or be long lost brothers. I thought my dad might question a bit when 5w-20 came out for the Fords, but he didn't even blink.


I wonder what he would say to me using 10W30 in the 3.0 V6, which i may start doing just due to the milage it has on it. it does not get below zero that often in New Jersey, wheras in Regina it gets way below zero.
 
If it's "supposed" to have 5w-20, he wouldn't have liked the 10w30 too much.
wink.gif
Personally, I'm not as picky about that as he was. He tended to go by the specs. The cab fleet did use 10w30 year round, since that was the lightest grade called for, before the 5w30 came around. Of course, for taxis, a 10w30 in the winter is fine when the thing never shuts off.

Heck, he stuck to 10w30 as soon as he could in vehicles from the 1940s and 1950s we were using on the farm. No straight weights, no 10w-40, no HDEOs except in diesels. The only reason he had SAE 30 around was because it was Rotella given to him by his brother who ran a Shell station. 20w-50 was a swear word around the house.
wink.gif


Oddly enough, there are a few old mechanics around here who go by "thin is in." One mechanic I know in town who got his journeyman's papers back in the 1940s thought the Germans were nuts for specifying something as heavy as a 15w40 for my old 1991 Audi.
 
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