I've talked to 4 seperate Volvo mechanics, and all reccomended the BOSCH copper sparkplugs. All said the same thing that while the PRV-6 was an extremly reliable engine, it was VERY finicky about what sparkplugs to use in it. Right now I have the BOSCH Platinum plugs in my D, and I can tell you that it ran MUCH better with the 20 year old copper ones it had. The platinums are fouled much easier because they have alot less of the electrode exposed. At first there was a noticeable inprovement with accelleration, but that wore off after about a month. From what I was told, BOSCH doesn't even reccomend the new Platinum +4 sparkplugs for the PRV-6 engine. As I've found with swapping out certain components on my car, it's better to just stick with what the manufacturer intended. -Robert vin 6585 (The DeLorean from hell.) --- In dmcnews@xxxxxxxxxxx, "Kevin Creason" <dmc4687@xxxx> wrote: > One last question for the evening: > What kind of sparkplugs are preferred? > Brand, type (forked tip, platinum....) > > And is it worth getting the micro-washers/shims to get the spark lined the "right" direction for the extra burn? > And what is the "right" direction? > > Thanks... I'm going to bed now and look forward to answers and flames in the mornining. :) > > > [Non-text portions of this message have been removed]