Triumph TR3 drawing

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Triumph TR3 FAQ page

Suitable Oils for Our Triumphs  - flat tappet (lifter) engines

From the folks at Castrol:

"This question is coming up more and more,  Anyhow, engines such as this that use flat tappets could be sensitive to reduced levels of Phosphorous in oil formulations, it appears that 0.1% is about the cut off point, so oils for flat tappets should contain .1%.  Phos has been steadily going down as the amount of ZDDP has been reduced to ensure compatibility with exhaust after treatment From our range the following are higher than 0.1%

Castrol GTX Diesel 15W-40 (CI4,CH4,CG4,CF4,CF,SL)
Castrol GTX High Mileage 20W-50 (SL,SM)
Castrol GTX 20W-50 (SL,SM)
Castrol HD 30 (SL,SM)
Castrol HD 40 (SL,SM)
Castrol Syntec Blend Truck 15W-40  (CI4,CH4,CG4,CF4,CF,SL)(Semi-synthetic)
Castrol Tection Extra 15W-40 (CI4Plus, CI4,CH4,CG4,CF4,SL)
Castrol Hypuron S 15W-40 (CI4Plus,CH4,CG4,SL)(Semi-synthetic)
Castrol Syntec 5W-40 (SL,CF)(Synthetic)
Castrol GO! 10W-40 Motorcycle Oil (SG)
Castrol GO! 20W-50 Motorcycle Oil (SG)
Castrol Grand Prix 4-Stroke Motorcycle Oil 10W-40 (SG)
Castrol Grand Prix 4-Stroke Motorcycle Oil 20W-50 (SG)
Castrol TWS Motorsport 10W-60 (SJ)(Synthetic)

 Steve Goodier
  Technology Manager (Americas CVO and Global OEM)"

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