It is said that there is the equivalent of five cows-worth of leather in the interior of the average Esprit.
Ask most Lotus owners (or Rolls Royce owners) what the best leather care products are and there will be only one answer: Leatherique. Not only do these people have a fantastic line of products, but there customer relations are second to none. They will do anything in their power to make sure you are a satisfied customer. Because of this Leatherique is endorsed by the Rolls Royce Club of America as well as many Lotus clubs. I have been using this for some time now with excellent results and I'm happy to recommend their products.
Leatherique is actually a line of products including Prestine Clean and Rejuvenator Oil. These are the best products on the market to restore old "cardboard-hard" leather and protect any leather in your car or home. You first work the Rejuvenator Oil into the leather with your hands and let the car sit for several hours in the sun so that it can be absorbed. You then finish the job by wiping on Prestine Clean and then wiping it off with a soft cloth. Your leather will look great and will have that new leather smell again.
If your leather color is faded, they also have a great line of color matched dyes that will restore the interior to its original look. Some Lotus owners have even changed the entire color of their car's interior using the dyes. What's even more amazing is that some of these color changes were from a dark color like black or charcoal to a light color like tan or ivory.
A word of warning: If you decide to use other products, test them first in a small inconspicuous place like behind the seats. Some owners have used products that have left some sticky goo on the surface that may be difficult to remove. This seems to be caused by some combination of cleaners and leather color stain. So, check it first.
To purchase Leatherique products, visit their website at: www.leatherique.com or call them at: (904) 272-0992.