General TR Secret to Horsepower

[glemon]

This is an interesting article https://www.google.com/amp/s/www.motor1.com/news/721424/engine-hp-vs-oil-level/amp/

Some fairly significant numbers on HP vs. oil level. Not suggesting we all drain two quarts out and go racing, but I am guessing a few ponies are left on the table running 20w-50 all the time.

Does anybody not run 20w-50 in their old British car? When I drove year round it was 20W-50 in the summer and 10w-40 in the cold months.

 

[CJD]

I've been running 5W-30 for the last 7 years...no problems.

 

[glemon]

I have been thinking of switching to a lower weight, I may give it a try. I have quite a bit of Castrol and Valvoline 20w-50 stocked up though.

 

[RJS]

I've run 10W-40 since I've owned the car (13k miles). No issues and oil pressure runs 65-70psi at 2000 RPM.

Bob

 

[TR-3rg]

Hi, I run 5W-40 synthetic year round. I have for 8 -10 years, no issues.

Roy

 

[mctriumph]

The truth is all the modern oils are fine as long as you add the ZDP to protect the camshaft,
No sure I can wrap my brain around the O weight 15 stuff.......
Mad dog

 

[Wire-Wheels]

I am running 20w50 year round in my TR6. Our ambient temp here runs well over 100° here every summer. I only plan to change oil ever 2 years or so because I do not drive it that much. I just got my Triumph 7 months ago. ...J.D.

 

[TFB]

This made me wonder if any of the Tr3/4 racers are blocking of the draft tube and using a pcv valve routed to valve cover or to atmosphere to reduce windage, and subsequently increase hp.
Tom

 

[CJD]

Racers normally remove the PCV system and go to a draft tube with a catch can to keep oil off the track.

 

[TFB]

Interesting.Is that because the vapors,blow by is more than the pcv system can handle?
I'm more familiar with v-twin mc motors where flywheels nearly fill the cases and getting the crankcase closer to vacuum,less air being pushed around, is a benefit.Maybe with the large crankcase this isn't a benefit.
Thanks
Tom