I do not know.

Less Blow-By into the crank-case would =  less air flow out the top breather pipe.

Is your top breather tube still emptying into the breather box ?

Is  your breather tube/hose still good might be a better question ?   They crack where they are stretched onto the top of the motor .

I use a little STP in my oil to cut the amount of blow-by.

About 1/2 pint / 3 quarts T-6 of 5w40.

Thanks OF.

MMRanch wrote on 02/15/21 at 17:18:52:


For my motorcycle - I would buy the narrowest range (15W-40).  The wider range means that there are more additives.....and unless you are riding in sub freezing weather the benefit of the 5W is not applicable, and 15W would allow your bike to start just as easily.

You should not be using 20W-50 in a modern car.....modern cars are designed with far closer tolerances and should be using the oil viscosity that the owners manual calls for (also listed on the oi fill cap).  My wife's car requires 5W-20.

In my 15 year old Pontiac - when the temperatures are down in the single digits - I do notice the car does turn over a bit slower with the 15W oil....and the 5W oil allows the starter to spin the engine over a bit easier during a cold start.

However - your adding STP to the oil is going to make your oil thicker than the 5W or 15W rating that the oil had when you bought it.

Your Savage and Guzzi can handle oil that is thicker than your modern cars can.  Your modern cars have been manufactured to run thin oil, and using a thick oil in them can cause less oil flow and actually starve the bearings for proper oil protection.

Watch this video:

https://www.youtube.com/watch?v=pPFSR-2lhxY


Read this article:
https://www.cycleworld.com/story/bikes/the-amazing-modern-oil-cocktail/

MMRanch wrote on 02/17/21 at 13:19:47:


If that is what your engine calls for from the manufacturer.

In the summer you can pretty much ignore the 5W, as you will never get cold enough in Tennessee to worry about the winter rating.  In the winter you should not be using a 0W rating if your engine requires a 5W or 10 W.

In the summer......you should not be using an oil with a 40 rating if your manufacturer wants you using a 20 weight oil (like 5W-20).

Your Savage is a bit more flexible about oil weight than a modern car - but it is not flexible about needing 1,000 ppm or more of ZDDP!

One tenth of 1 percent   (roughly)

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1344471565

Recommended Oils for Your Savage (Read 3096 times)

Dave, MM is jest trying to provoke him a little bit of an oil war because he's in the hospital, bored and sick and he cannot go riding.

(He is also a secret fan of adding some STP to his bike's motor oil).

He's hunting for the perfect mix ratio stated in ounces.

Parts per million just isn't in his mix language.

40 to one and 24 to one are terms he likes, he uses them every year for mixing stuff for chainsaws and snow blowers.



Rotella T6 currently runs around 1100 PPM of ZDDP

....  which is down from the traditional 1200 number but is up from the 900-1000 PPM number used today in in a lot of heavy duty car oils.    Light duty car oils can run 600 PPM or less, so be careful what you put in your bike.

Rotella has yo-yo'd the ZDDP up and down and down and up again, along with similar but inverse movements in moly amounts according to the requirements placed on the oil industry written by the EPA while supposedly representing the CAR makers.

This is why we used HDEO diesel oils on this list, because they are not so violently up and down on the good stuff according to actions of semi-political government regulatory bodies.

(and yes, it is a fact that some modern (post 2014 ???) Savage engines have tappet followers with hard faced inserts to help fight this issue --- but the older Savages don't have this hard insert advantage and the cam chain system on both will still always need significant amounts of ZDDP to keep the cam chain links and pins from wearing out prematurely)


Recommended Oils for Your Savage (Read 3096 times)

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1344471565