Paul Rivera, 1967 XKE 2+2

I just purchased a 67 4.2 2+2 from a dear friend who has owned it since '70.
He had it rebuilt 20 years and several thousand miles ago.

I am afraid that if I were to use synthetic, it would not be compatible with the seals. Any truth to this?

Should I stick with Castrol GTX and what viscosity is advised?

Thanks

Submitted by mfrank@westnet.com on Tue, 02/24/2004 - 10:46

Castrol 20W50 is the usual choice, but I've recently been using Mobil 1 0W40. I'll be doing an oil analysis shortly to see if there's any wear problem, but I expect none. Synthetic oil builds pressure quickly in the critical few seconds after you start the motor. I figure this is especially good for a car that isn't used daily. In the past, I've had leakage problems with synthetics, but I think the recent formulations are much better in that regard.

Mike Frank

Submitted by NE52-32043 on Mon, 02/23/2004 - 11:11

Castrol GTX 20W50. Some people have tried the so-called "Max-life" formulation that is intended for older cars. If you change your oil regularly, it's probably not necessary. And do change your oil regularly. The filter too. Consider a spin-on oil filter adapter like the one sold by Coolcatcorp.com (NAYYY, just a happy customer). I have their spin-on adapter on my '70 as well as the quick drain plug replacement. Both high quality products.

Steve Weinstein
'72 E-type 2+2
'70 XKE FHC

Submitted by bonnettoboot@e… on Sun, 02/22/2004 - 18:24

Synthetic oil will not harm the seals. whether or not you need to use it is subjective. What is important is using the latest SAE specification oil and the correct grade and changing it regularly (3000 miles). In Los Angeles we use 40 wt in older engines and 30wt in newer. If you live in a cold climate you will need a thinner oil 10 or 20wt. or in an area where there are extremes of temperature a multi grade.

Jaguar affectionado and etc.