jerseyjeep01
NAXJA Forum User
- Location
- Berlin, New Jersey
I use Castrol Syntec 10w-30 and a K&N filter. Has anyone heard anything about the Castrol Syntec oils good or bad?? Just wondering if I should switch out.
92DripCherokee said:I run mobil 1 15w40 in my 2000, and mobil clean 5000 10w30 in my 92.
Synthetic oil is superior in every way except initial cost. If you keep your automobiles long after their design life, like all of us fools, go with synthetic.
Seal, o-ring and gasket leaks will only worsen if they were shot and merely caked up in crud.
Mobil makes a fine oil, so does amsoil, castrol, kendall, valvoline.
I took the heads off a cadillac v8 engine with 98,000 miles that was fed valvoline for the last 40,000 and it was spotless, with zero sludge.
Quaker state and penzoil arent even oil. I've seen first hand what penzoil becomes, and its a sludge bomb. Saw a 1993 chevy 305 that was filled to the top of the valve cover with sludge.
jerseyjeep01 said:I've been doing a little research and have read that Castrol Syntec is not a "true" synthetic oil! Mobile 1 sued Castrol for the claim but lost. Castrol uses cat III base stock instead of IV? Who knew???
K2XJ said:How often was that oil changed?? Any dino oil will sludge up if it isnt changed at the correct intervals.
Things have changed. Maybe in the past their oil was crap but time heals all. I think their formula has improved greatly. Pennzoil is a highly respected oil in many circles. Check out www.bobistheoilguy.com if you dont believe me. It has shown great used oil analysis.
I used Castrol Syntec in the afore mentioned Contour from 20K to about 165K. I ran 5K oil changes in warranty and did some close to 10K out of warranty. The last one I remembered was a 9K oil change at probably 155K or more. The engine used 1/2 a quart during that time. So its not a bad oil. There may be better. It does come down to cost though. Pennsoil Platinum is gaining respect. Both are Group 3. I think Ferrari ran Shell group 3 oils in F1. I think they did OK. I hear some of Mobil 1 is being reformulated to group 3. Probably cost.jerseyjeep01 said:I use Castrol Syntec 10w-30 and a K&N filter. Has anyone heard anything about the Castrol Syntec oils good or bad?? Just wondering if I should switch out.
Don't believe what they tell you.75SV1 said:I think Ferrari ran Shell group 3 oils in F1.
Its a myth that you can't change back and forth between dino and synth oils. Up to the early '80s this might have been true. I remember hearing/reading that you couldn't mix the two. Now you can. With the cold weather and your need of quick starts, I'd stick with synthetics. The only problem would be if you had leaks. Still, once you use synthetics, I hear you'd be stuck with the leaks. It would be best to repair them. It doesn't sound like you have leaks though. It could be getting past the valve guides though. I hear there is sometime increased oil consumption when you first switch over to synth oils from conventionals. Sometimes it goes away. You might also try a different brand. The reason I went with Castrol Syntec over Mobil 1 around 1997 was that one guy were I worked said he got less oil consumption with Castrol than Mobil 1. I'm not saying QS is a bad oil.tkjeeper said:I run Quaker state Q full syn, have done so for approx 8months, have had small oil burning since then, to be honest I'm afraid to go back to regular oil, I've heard it is not good to switch back once you've been running syn for a while, I run syn because of the frigid winters up here and Im on the FD so for middle of the night calls I dont have time to warm up the jeep its just run and gun and I thought syn would offer me better cold start protection. I run a fram syn filter and oversized at that but I still burn some oil, not enough to cause alarm, I have 200,000 miles on the baby! And I keep Lucas in it regularly. Should I switch back or stay on track?