Hey guys! I was wondering what motor oils you use, and what your reasoning is. I need to do my first oil change on my 87 XJ6. In all my other cars I run Castrol 20w-50, as I'm in Austin, TX and it seems to work well fir the Triumphs and MGB. The basic facts: it's hot here in Austin most of the year. I'll be using this car as my daily driver more now, and usually drive about 45 miles a day overall. The car is less than 100k miles on it, has good oil pressure and runs cool. Curious to see what you have to say.

 

what you are using is as good as it gets, I ran it in Florida for a long time, just my two sence worth---- good luck ,Satterfield

 

We get 50C+ summers here, and my list is:

X300, D driver, 10W/30, all year round. 207k kms
S Type 3l V6, 10W/30 all year round. 126k kms
MK10 3.8L. 15W/40 all year round. NO idea, about 400k miles.
XJ12 S2 PreHE, Fuel Infected. 15W/40 all year round. 550k kms.
XJ-S HE V12. 10W/30 all year round. 260k kms.
XJ6 S2 4.2. 15W/40 all year round. 320k kms.

 

I and my critters have lived mostly in temperate climes. Most including my Jaguar lump and my experienced Jeep do just fine on CARQUEST 20-50 also known as Valvoline!!

Thin oil are an anathema to me because f a poor experience way back when. But, in very cold, yeah, that is what is needed.

Castrol has a great rep!!

 

Well I'm going to go with Castrol 20W-50 for starters and see how things go. I'm also looking at replacing the fan with a thermostatically controlled electric one. Small improvements shall be the order of the day.