Valvoline Racing oil vs Rotella T 15W40

[Merk]

Originally Posted by a3v03v0

Ouch

I posted about the two oils because earlier others posted about using one of them, Rotella T 15W40, for the Zinc levels. The racing oil has more. I did not say go out and use this oil. I posted about what I discovered and put forward some doubts based on that information. Doubts translate into question which should result in discussion.

Are the oils sold by briggs or kohler designed for todays engines or the decades old engines in our old cubs. Or are they more about keeping the EPA happy. It seems fair to look around and see if we can do better which should always be the case.

Iff $4 an oil change would do a better job of protecting the small engines I care for most I would use it in a heartbeat!

Both Briggs and Kohler oils say the are design for older engines.

[ol'George]

As a kid I remember a lot of vehicles of the late 40's early 50's vintage followed by a cloud of blue smoke, it was expected of a vehicle with maybe 50,60,000 miles.
I'd be my guess not only oils have improved greatly, but so have engine rings and their designs, as well as crank case ventilation systems
I'd guess todays least rated oils are superior to yesterdays best oils.
I just don't see many valve cover insides caked up like yesteryear and
a properly maintained engine @ 200,000 using little oil if any.
just my $,02

[64fleetside]

In the engines I've replaced/repaired/tossed over the years of wrenching, oil quantity, not quality has always been the issue. Keep it full and keep it changed.

[Shrewcub]

Originally Posted by 64fleetside

In the engines I've replaced/repaired/tossed over the years of wrenching, oil quantity, not quality has always been the issue. Keep it full and keep it changed.

AMEN!!!

[a3v03v0]

Following manufactures recomendation ensures you do not have the wrong oil for the time the recomendation was made. It will be a good oil and may even be the best oil. Decades after the recomendation it is not always that simple.

As mrmousepotato said over a decade ago on another forum

after starting this thread, i decided to see if an answer to my question already existed.

lo, i discovered one thing: the old adage about topics of discussion to be avoided needs to be expanded: "never discuss religion, politics, or motor oil ... .

[green 4 acres]

your southwest oils had /have a paraffin/waxy build up problem ,that the Pennsylvania grade did not, but those brands are mostly gone or are using the SW oil now . or so I was told at tech schools Nissan, volvo, Lexus, mitsu

I use 30w non-detergent in the cub cause it's a spash-oiler , but guess were talken racing oil or best auto use oil.

you used to look for the API rating but now theres only really gas ,diesel grade

this site has much info
http://www.carbibles.com/engineoil_bible.html