i have a 1995 Vanden Plas and have been thinking about replacing my spark plugs. What type should i put in?

Champions are fine.

I use NGK Iridium plugs because I heard they were easier on the coils <shrug>

Cheers
DD

NGK Iridium

On the X300 models, 95-97 XJ6, our shop sticks with the original Champion plugs. Lawn mowers and old British cars love Champions. The later v8 cars, go with the iridium plugs.

anybody have any luck with the bosch +4 plugs?

They are good plugs, but we've had the Bosch plugs miss in the X300 models. They work great on every other car. I guess the X300 is like buying for your mother instead of your wife. Your X300 just wants you to think about her and not spend too much....

I have Bosch Platinum ??? in my 1995 xj6 and they work great no problems! Sorry Ken!

No offense. Glad you are rolling along!

I replaced the NGK iridiums I had in there with the bosch+4's and saw quite a noticeable power increase. also, the NGK's looked a little charred after 8,000 miles or so.
I guess just try them all until you find a set that works well

Yup, good old RC12YCs. I can't remember how many X300s we yanked Bosch Platinums out of and replaced them with the $1.29 Champions and the car ran perfectly.

My Own 95 Vanden Plas lasted past 160k on em, and I never did put a coil pack in that car.

i went with champion plantniums. the old ones were so bad. installed the new ones and shes idling like a rock. cant wait to take her for a drive in the morning. thanks for your guy's opinions

RC12YC? Just looking for clarification here because I work for an auto parts store and I'm listing that our cars came stock with RC9YC and not the RC12YC's. Physically looking at the plugs they look virtually identical, but I don't want to put the wrong plug in the car.

With that said, has anybody tried the E3 diamondfire plugs? I'm torn between going for the cheap champions or giving the E3's a spin at $6.99 a pop, though I do get 20% off. Any words of wisdom from those who've used them?

The 9s were original fit but I believe Jaguar recommended the 12s in a technical bulletin but only for USA market cars

Cheers
DD

Thanks Doug, that makes sense since physically looking at the plugs I couldn't tell the two apart as they had the same threads and dimensions. Now I just have to figure out if I want to go for Champions or be different and give the E3's a try

I have E3 in my 95 Mustang put them in a 2000 Cherokee before I sold it. I couldn't tell a difference. My neighbor put them in him Toyola Tacoma with a 4 cyclinder and the truck gave him a check engine light after about 6 months of use. The code was a misfire and he replaced the plugs. Shes been running for about 2 months with no more codes. My $.02

I am not sure what the hype is on plugs! I am 63 years old and to today I never had a bad plug in any of my cars. Mowers Yes! As for the plugs I have in my 99xk8, 95xj6 and my Toyota Rav4 they are Bosh Platinum Plus & +4. My suggestion to you is to purchase what works for you and keep in mind do you want to replace them again and if so how often.

Good stuff here guys. I dont mind having to replace the plugs more often so I'm going to go with the good old copper champions. Copper gives a cooler spark, and while a plug of the platinum or iridium variety may work fine for most individuals I wouldn't feel good using a plug that may be a bit hot for our cars. With my employee discount I can have a whole set of champions for $10 including tax...can't really beat that

Go for it!

Just did! My '95 has over 160K on it and I just threw the RC12YC's in it a few hours ago and man she is SMOOTH! The boss seal on cylinder 1 is leaking heavily though and the old plug I pulled out was soaked in oil (amazing the car wasn't misfiring). I just got back from work ordering a valve cover gasket and 6 boss seals which will all be there waiting for me tomorrow. Only thing left right now to make this car darn near perfect is doing a few control arm bushings in the front and rear, and throwing some rear shocks in it along with a new coat of paint and refinish the wheels. Already threw new Bilsteins in the front over a year ago so the rear requires most of the attention now to get rid of various knocks, rattles, and squeaks while going over bumps. I may need to give the rear subframe bushings another look as well. I'm hoping over the next 6 months as I piece this all out she'll be good as new. I'm a former ASE certified tech and do all my own work, but college is soaking up most my funds right now

Glad you made the decision and got the plugs you want. The oil in the plug is not uncommon and you should pleased that it did not cause you a problem on the road. As for the rear suspension if you are capable of doing it you are in better shape than most and if you lived closer I would ask that you help me install my rear shocks. I just purchased a 200 S-Type and have the 95 xj6 up for sale with hopes it goes soon. They are great cars and this one has been good to me.