Recently got a 71 Triumph TR6 with 76K for a weekend "beater", planning to use it once or twice a week 9 months a year, maybe 3K annually in Southeast Pennsylvania. TR has a straight 6, not a high compression or high rpm engine redline at 5500, more typically run between 3500 and 4000 rpm
Moss Motors advertises (at almost 6 bucks qt. in case lot)
that "Collector's Choice engine oil is a must for your classic engine. Contains 'pre-ban' ZDDP levels . . . ."
The FAQ for "Collector's Choice" states that diesel oils are not good substitutes for ZDDP car oil because their high detergent levels maintain more contaminents in suspension and have a lower surface tension, with accompanying shear reduction, all of which increase wear compared to ZDDP car oils.
On this site, I've seen the posts suggesting both 15W-40 diesel oil and 20W-50 oils for similar high milage old cars. And I read through the article on molybednum added oils as superior to ones with zinc.
So I have a couple questions:
1) is there any information about the "Collector's Choice", a 20W-50 manufactured by Hicks Oil?
2) Is the diesel detergent level analysis valid or relevant?
3) should I stop fretting about ZDDP and just find a good moly added oil instead, and if so, which are available?
4) Is it true, as I heard, that, besides the milage reduction it causes, the strain a 20W-50's greater viscosity puts on the oil pump offsets the value afforded by the greater protection which is lost anyway as the multi weight degrades?
thanks for any guidance!
Moss Motors advertises (at almost 6 bucks qt. in case lot)
that "Collector's Choice engine oil is a must for your classic engine. Contains 'pre-ban' ZDDP levels . . . ."
The FAQ for "Collector's Choice" states that diesel oils are not good substitutes for ZDDP car oil because their high detergent levels maintain more contaminents in suspension and have a lower surface tension, with accompanying shear reduction, all of which increase wear compared to ZDDP car oils.
On this site, I've seen the posts suggesting both 15W-40 diesel oil and 20W-50 oils for similar high milage old cars. And I read through the article on molybednum added oils as superior to ones with zinc.
So I have a couple questions:
1) is there any information about the "Collector's Choice", a 20W-50 manufactured by Hicks Oil?
2) Is the diesel detergent level analysis valid or relevant?
3) should I stop fretting about ZDDP and just find a good moly added oil instead, and if so, which are available?
4) Is it true, as I heard, that, besides the milage reduction it causes, the strain a 20W-50's greater viscosity puts on the oil pump offsets the value afforded by the greater protection which is lost anyway as the multi weight degrades?
thanks for any guidance!