Yep, I believe in using one of the sponsors oils as well.
I'm sure some will scream at their computer screen when they see my recommendation, but in conditions like you'll be running, I'd want
maximum protection. Decrease in fuel economy over a thick 30-weight or thin 40-weight will be minimal and I don't believe the thicker oil would amount to even a .1 time difference at the track.
I don't recommend the "racing oils" because while they do have good levels of anti-wear additives and nice HT/HS levels, they skimp on the detergents, which you want and need in a vehicle that is operated like this.
I recommend:
Between Valvoline and Kendall oils, and as long as the temperatures aren't too cold, I'd choose the
Kendall SHP Diesel Oil.
For an oil filter, I'd choose a
K&N filter, as among widely available filters, it has the best flow.
This will give you a combination that you can run for the whole journey if you'd like, but mainly, offer you great anti-wear and high temperature/high shear protection.
From Kendall site:
BEYOND PROTECTION
For those that need maximum protection, Kendall SHP® engine oil delivers. Formulated using high-quality base stocks and robust, technologically advanced additives, this synthetic blend oil delivers outstanding year-round protection, especially for extended drain intervals and severe operating conditions. Why opt for synthetic blend? Our formulation provides better oxidation resistance and lower evaporative losses at high temperatures compared to conventional all-mineral engine oils. With a proprietary chemistry that results in high levels of detergency, dispersancy and TBN, SHP® is designed to prevent soot from depositing on critical engine surfaces and thickening the oil, thus minimizing abrasive wear (especially critical for modern EGR engines). In short, this synthetic blend oil was created to provide uncompromising on-road and off-road protection. If you want the very best for your fleet, get Kendall SHP®. Kendall SHP® engine oil includes the following enhancements derived from the use of both Group II and synthetic base stocks, plus proprietary additives:
* Exceptional anti-corrosion engineering
* Outstanding wear protection and deposit control
* Superior oil consumption control
* Extra protection in extended drain, severe service or EGR-equipped engines due to our high alkaline reserve
* Excellent soot control from enhanced dispersancy
* Better oxidation control
Spec. Sheet:
http://www.kendallmotoroil.com/techdata/fleetcommercial/K_SHP_DIESEL2.PDF
[ February 12, 2004, 02:43 AM: Message edited by: Jelly ]