1978 R100/7 recommended Spark Plug ? / Recommended Oil - Synthetic? Regular? Brand?
I am in Ohio, where currently it is frigid and cold, and am wondering what some of you think about:
What is the current number(s), Brand(s) that are most recommended for reliability for spark plugs?
Do people use/recommend various heat ranges? If so, under what circumstances do I use which one?
Also what oils are most recommended?
Is is OK to switch completely to synthetic.
I just got back into the BMW family, and way back when (late 70's, early 80's) on the /5 bikes, the consensus opinion was to avoid any synthetics, but I suspect their apprehensions were unfounded simply because synthetics were new on the scene.
However, now, with the latest advances in synthetic technology I would guess that some have tried and now swear by some form of synthetic oil. What brand/viscosity?
BTW, I have read the oil report, and found it not very helpful. I suspect that some of you have some valued experiential knowledge.
What do you suggest for both of these questions?
NGK's are available and cheap
[QUOTE=20774;849200]The standard plug for the R100/7 is a Bosch W6DC (non resistor). In NGK, the BP6ES would be used.[/QUOTE]
Good luck finding the Bosch plug. i run either the NGK W6DC or a NGK W7DC in a couple of bikes, my slash 7 seems to enjoy a 6 whereas the 72 slash 5 likes the 7 range. So I go to just about any auto parts store and buy a box of 4. A box of 6's and a box of 7's, I think they are in the $2.75 range per plug. A common problem on most older airheads is the right hand cylinder runs a bit rich due to the crankcase breather hose hanging out on the right side and feeding a steady supply of oil mist into the cylinder. It is not that bad but does create a richer condition on the right side. Usually around 5,000 miles I replace just the right side plug, then the next time both of them. Good reason to just buy a box of four.
Oil: I use the prescribed dino oil of the 70's. Spectro 20w-50. Works fine as far as I am concerned, got 105,000 on the slash 7, she is happy, price of the oil is reasonable, I do roughly 3,000 miles changes and every other change a filter. However, that does not always work. My last oil change cycle was about 2,700 on oil only, then I went about 4,000+ before then next one, because they were all hwy miles the oil still looked fine. Oil is not something I would fudge on, I am somewhat anal on making those regular changes but don't feel bad if they are just a bunch of hwy miles between a change.