You can expect them to work and work well. Most of us think they won't be any better than regular NGK plugs. Sure, they will pep up an engine, but so will any new plug -- as spark-plug test after spark-plug test has shown...split-gap, tri-gap, quad-gap, etc, etc.

If you can find them at a good price, go for it.
* NGK BP5EQ-11
* 1977-1978 US models - 5-speed transmission
* Gap: 0.039-0.043 in. (1.0-1.1 mm)

This gap was used on all B210s with the modern electronic ignition. Most 1977 and 1978 B210s had it.

All 1979-1982 Datsun 210 was gapped at 0.039-0.043 in. -- so the BP5EQ-11 isn't special for the gap.

Conoco devloped synthetic oil tech and sold it to Mobil as they used to be a lubrication Tech Company, now they make their own. Also look at the HYDRO-CRACKED range of products. I sold them here in OZ and did my own inderpendant testing in fleet conditions. In many cases the hydro came in better than the syn. I am sure that there would be some stockists over in US. I no longer have my data books as they went with the business. I am sorry I can't help any more than that. I won't put any other product in all of my families cars. I have seen the results personally. This stuff amazes me. EG: 35000 miles between change outs in a GM 92TA. Our norm here for one of them is 12000 miles. I don't have to change out my Datsun before 20000 but I do her at 5000 regardless and my cheapscate father uses my old oil in his Nissan Teranno.(How BAD is that!)I am waiting for the Teranno to go BLOW-COUGH-BOOM!

Thanks Peter, wasn't aware of that. I found this morning:
Quote: Listed as 25,000 mile oil, it seems it would be less expense than even regular oil (if indeed only changed every 25,000 miles or even 15,000 miles).

How do I find this "group III Oil" are the properties of this oil above and beyond synthetic's? Also, I have decided to go with a 5W-30 viscosity in the engine of the 77 with an A14, any objections?

To clarify an earlier post, It was stated by "ddgonzal" that my 77 B210 - stateside, A14, non California w/catalytic converter - would take a multi gap plug "NGK BP5EQ-11". The actual plug required is an NGK BP5EQ-13 as stated per owners manual, also refering to a cold - normal - hot range of 4,5,6 respectively. I appreciate "ddgonzal" knowledge and respect his input, just wanted to clarify this one item.

Please ignore my stupidity. I did the research on group III oil. It seems that I an already running it in my vehicles!

Thanks for pointing out that inconsistency. The Tune-up article lists NGK BP5EQ-11, with gap of either 13mm or 11mm.
Quote:

What does the 1978 FSM say?
Quote:So five-speed is listed with larger spark plug gap. This is with the special distributor D4F7-01.

FU models also have less static timing: 5 degrees instead of the usual 10 degrees. Emission controls are different too.

God!! I hate emission control systems. Do what some of us do here block it up or just rip it off. Re-tune and away you go. I was once asked if I was worried about Carbon Footprints. I said "When I start up my car it leaves a STOMP MARK!"

Found my NGK plugs in the mail today! Pulled the out the Autolites (in it when I bought the car). The Autolites were gapped at .35 and the NGK multi-gap's came at .35 out of the box, regapped at .50. "77" is feeling better.